Season 1: Alex Michel and Amanda Marsh
Source: popista.com
In the first season of The Bachelor, management consultant Alex Michel chose Amanda Marsh at the end but didn't propose to her. They dated for a few months but then broke up.
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Last we heard, Alex was a spokesman for Match.com and "Romance and Proposal Expert" for Princess Cruises and was in a serious relationship but not married. 
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Amanda Marsh (now Amanda Caldwell) married childhood friend Jay Caldwell, and they have a daughter, Chloe.
Season 2: Aaron Buerge and Helene Eksterowics
Source: popsugar.com
Aaron Buerge, a banker and restaurant owner, proposed to Helene Eksterowicz at the finale of the show, but they broke up soon after. 
Source: popsugar.com
Aaron met his now-wife, Angye, at a sports bar in his Missouri hometown.
They married in 2009 and now have a daughter together along with his wife's teenage daughter. 
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Helene Eksterowicz got engaged to Andrew Goodman, a senior technology consultant for IBM, in January 2013 after a year and a half of dating and got married that Summer.
Season 3: Andrew Firestone and Jen Schefft
Source: popsugar.com
San Francisco tire heir Andrew Firestone proposed to Jen Schefft at the finale, but the pair parted ways just months after the show ended. 
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In 2008, Andrew married model Ivana Bozilovic, and they have three young children.
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Jen became the third Bachelorette, but she rejected Jerry Ferris's proposal at the end of the season. She wed businessman Joe Waterman in Chicago in 2009, and the stay-at-home mom now has two young girls.
Season 4: Bob Guiney and Estella Gardinier
Source: dailymail.co.uk
In the finale of his season, former Bachelorette-contestant-turned-Bachelor Bob Guiney chose Estella Gardinier, a mortgage broker, but they broke up not long after the show aired. 
Source: instagram.com
In July 2004, Bob married All My Children actress Rebecca Budig, but the two divorced in 2010. He's since hosted HGTV and TLC shows and is a musician in a band called Band From TV.
He recently announced his engagement to Jessica Canyon. 
Source: twitter.com
After briefly seeing country singer Steve Holy in 2004, Estella is single.
Season 5: Jesse Palmer and Jessica Bowlin
Source: popsugar.com
Canadian American college football player Jesse Palmer picked Jessica Bowlin but didn't propose. They split a few months later. 
Source: instagram.com
Still single but focused on his career, Jesse Palmer is now a sports commentator for college football on ESPN in the United States and a football analyst for TSN in Canada.
Source: popista.com
After the breakup, Jessica graduated from East Carolina University and Chapman University Law School and passed the State Bar of California in 2007. Not much else is known about her, but according to her Facebook page she's now married with the last name Rawi and has a little boy.
Season 6: Byron Velvick and Mary Delgado
Source: viralbig.com
Pro bass fisherman and divorced father Byron Velvick proposed to Mary Delgado (a former cheerleader with the NFL's Tampa Bay Buccaneers) at the finale, and they had a rocky relationship for five years before breaking up in 2009. During this time, Mary was arrested for punching Byron in the face. 
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Byron is still fishing and has made appearances on fishing-related TV shows.
He runs a resort at Amistad Reservoir in Texas. 
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Mary has had many run-ins with the law, including a DUI misdemeanor in 2010, the battery charges against Byron in 2007, and an arrest for public intoxication in 2008. But she may have cleaned up her act, as she's started the Mary Delgado Real Estate Services page on Facebook and is still into fishing competitions.
Season 7: Charlie O'Connell and Sarah Bice
Source: thecelebrityauction.com
Actor and younger brother to Jerry O'Connell, Charlie O'Connell picked Sarah Brice in the finale but didn't propose. They broke up two years later, got back together, and then broke up for good in 2010. 
Source: instagram.com
Charlie and Sarah allegedly broke up in 2007 because of his drinking.
He's now sober and still acting, and he's now dating Playboy model Anna Sophia Berglund. 
Source: twitter.com
Sarah is married and has two little boys. She works for a cosmetic procedures company.
Season 8: Travis Lane and Sarah Stone
Source: popista.com
Travis Lane Stork, a doctor, chose schoolteacher Sarah Stone but didn't propose. They called it quits soon after. 
Source: vokrug.tv
In 2012, Travis married pediatrician Charlotte Brown.
Travis cohosts the daytime talk show The Doctors. 
Source: popsugar.com
Sarah Stone (now Sarah Stone Smith) became a real-estate agent in Nashville after the show. She and her husband have two young daughters.
Season 9: Prince Lorenzo and Jennifer Wilson
Source: usmagazine.com
Cosmetics entrepreneur Prince Lorenzo Borghese picked Jennifer Wilson without the proposal, and they broke up the following year. 
Source: live-av.info
Lorenzo is the owner of Royal Treatment Italian pet spa and Rumgolf.com and is the president of Animal Aid USA. He's been spotted out with Linnea Sensenbaugh, but it's unclear if they're in a relationship.
Source: popsugar.com
Jennifer is married to an accountant from Ohio, Lee Gerschutz, and they live in South Florida. She is now a wellness coach for Juice Plus.
Season 10: Andy Baldwin and Tessa Horst
Source: viralbig.com
US Naval Officer Andrew (Andy) Baldwin proposed to Tessa Horst in the finale, and she accepted. They then called off their engagement after the show but continued to date for six months before ending things in 2007. 
Source: instagram.com
Andy briefly dated Karina Smirnoff from Dancing With the Stars, but now he's focused on his philanthropic efforts and triathlons.
He appears to be single now, but last we heard he was dating Natalie Davila. 
Source: popsugar.com
Tessa still lives in San Francisco and is the founder of the Infant Growth Group as well as working as a clinical supervisor at A Better Way. She is married to a man named Tom Pickard after getting engaged in 2013 and has a baby boy.
Season 11: Brad Womack
Source: notey.com
Bar owner Brad Womack picked DeAnna Pappas and Jenni Croft as the two finalists but then turned them both down in the finale.
Even though this made him hugely unpopular, Brad got a second chance as season 15's Bachelor.
Season 12: Matt Grant and Shayne Lamas
Source: becuo.com
Global financier Matt Grant proposed to Shayne Lamas in the finale, but they broke up the same year the show aired. Matt lives in London and is now a manager at Fourth, a provider of cloud-based cost control solutions to the hospitality industry. After dating Bachelor Pad winner Natalie Getz (who was rejected on Jason's season of The Bachelor), he has a new woman (and baby!) in his life. 
Source: zimbio.com
Shayne was arrested in 2009 for a DUI and later had some minor movie roles.
Within a few hours of meeting Nik Richie (who runs a gossip website) in 2010, she married him. They have a daughter named Press and are expecting a second child via surrogate after a miscarriage nearly killed her. They also starred on VH1's Couples Therapy.
Season 13: Jason Menick and Melissa Rycroft
Source: nydailynews.com
Single dad Jason Mesnick (who struck out on DeAnna Pappas's season of The Bachelorette) made his season extradramatic by proposing to Melissa Rycroft at the finale and then dumping her for the runner-up Molly Malaney on live TV during the "After the Rose" episode. 
Source: popsugar.com
A year after the show, Jason and Molly got married on national TV in 2010. They now reside in Seattle with Jason's son, Ty, from a previous relationship and have a little girl together named Riley. 
Source: instagram.com
Melissa married her longtime friend Tye Strickland in Mexico in 2009.
She has a daughter named Ava and a son named Beckett and recently announced she is pregnant with baby number three. After placing third in Dancing With the Stars in 2009, she won first place in Dancing With the Stars: All-Stars. She and her husband were also part of a CMT reality show, Melissa & Tye.
Season 14: Jake Pavelka and Vienna Girardi
Source: social.popsugar.com
After getting booted off Jillian Harris's The Bachelorette season, pilot Jake Pavelka proposed to Vienna Girardi. They broke up in 2010, just a few months after the show aired. 
Source: popsugar.com
After his stint on Dancing With the Stars, Jake agreed to be on Bachelor Pad with ex Vienna and her (now-ex-) boyfriend Kasey Kahl. After dating Kristin Chenoweth, it appears he's currently single.
Source: instagram.com
Vienna had a very public relationship with former Bachelorette contestant Kasey Kahl on Bachelor Pad. The pair split last year. She appears to be single.
Season 15: Brad Womack and Emily Maynard
Source: nydailynews.com
Brad came back for The Bachelor's 15th season. But alas, he and his final lady, Emily Maynard, only lasted a few months after the proposal. They broke up soon after. 
Source: instagram.com
In 2013, Brad dated former contestant AshLee Frazier, who was on Sean Lowe's season.
It appears he is now single and co-owns several Texas bars with his brothers. 
Source: instagram.com
Emily went looking for love again as the Bachelorette and was engaged to her pick, Jef Holm, for just a few months before they broke off their engagement. She's now married to Tyler Johnson and they recently had a baby boy together — little brother to Emily's daughter, Ricki — and are expecting again!
Season 16: Ben Flajnik and Courtney Robertson
Source: imagefully.com
Bachelorette Ashley Hebert's runner-up, Ben Flajnik, shocked everyone by proposing to the villain of the season, Courtney Robertson. The winemaker and his fiancée broke things off while the show was airing but reconciled and got engaged again during the "After the Rose" show. 
Source: instagram.com
Ben and Courtney called it quits and broke off their engagement. Ben is now dating recent University of San Francisco grad Stephanie Winn.
Source: popsugar.com
In 2014, Courtney released her tell-all memoir, I Didn't Come Here to Make Friends: Confessions of a Reality Show Villain, in which she makes some shocking sex revelations. Just a week after breaking off her engagement to Ben, Courtney started dating Arie Luyendyk, Emily Maynard's runner-up from her season of The Bachelorette. They broke up soon after, though, and now Courtney appears to be single.
Season 17: Sean Lowe and Catherine Giudici
Source: dallasnews.com
After a sweet romance throughout the season that involved handwritten love notes, Sean proposed to funny fan favorite Catherine in the finale. 
Source: instagram.com
Sean became the first Bachelor to marry the woman he chose in the finale when he and Catherine tied the knot in a live TV wedding in January 2014.
Sean also appeared on Dancing With the Stars. The couple are expecting their first baby together.
Season 18: Juan Pablo Galavis and Nikki Ferrell
Source: inquisitr.com
American-born Venezuelan and former pro soccer player Juan Pablo didn't make it far on Desiree Hartsock's season of The Bachelorette but still won fans over enough to become the Bachelor. Unfortunately, he quickly lost favor with fans after some sexist, antigay comments and poor behavior. He gave Nikki the final rose but did not propose, and their relationship seemed rocky during the "After the Rose" episode when he refused to say he "loved" Nikki. 
Source: instagram.com
Juan and Nikki broke up after months of a tumultuous long-distance relationship that included a stint on VH1's Couples Therapy. Juan Pablo appears to be single and working in the entertainment industry.
Source: instagram.com
Nikki talked to Chris Harrison about the breakup on the red carpet of the Bachelor season 19 premiere, saying, "He lives in Miami, and he's in the entertainment industry, and that's his job and his lifestyle. It was really hard for me to fit into that. At the end of the day we gave it a go, but we're just two different people." She is engaged to Tyler Vanloo, a guy she met before being on the show. They were friends for years before they started dating. Congrats, Nikki!
Season 19: Chris Soules and Whitney Bischoff
Source: brunchnews.com
"Prince Farming" Chris Soules proposed to Whitney Bischoff during the finale of his season of The Bachelor. 
After Chris Soules finished his stint on Dancing With the Stars, news broke that Chris and Whitney had split.
Now Chris back to being a farmer and taking "felfies."
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Whitney said she was "casually dating" after the breakup, and she recently posted a photo with her new love interest, Ricky Angel.