Blake proposed marriage to Katie during her The Bachelorette finale, which aired in August 2021.
Blake and Katie, however, fought too much and realized they weren't compatible once they took their relationship into the real world, and so they announced their breakup in late October 2021.
Katie found happiness after Blake with John Hersey, a San Diego-based bartender and one of herThe Bachelorette Week 2 eliminees. The pair went Instagram official in November.
Katie faced backlash for having moved on from her former fiance too quickly with a "rebound," and Blake said on the "Talking It Out with Bachelor Nation" podcast in November that he felt "flabbergasted," shocked and "speechless" upon finding out about Katie's romance with John.
Blake also said he believed Katie had been emotionally cheating on him with John -- which Katie and John have both firmly denied in the press.
Katie and John have insisted they didn't see each other as more than friends until Katie became single again, and the pair admitted they considered hiding their relationship at first in fear of how Bachelor Nation might react to and judge them.
"We were already talking about how to not be [seen and] known. But it's also like, 'F-ck that.' I want to live our best life. I want to live in my happiness. I went through hell and back being on TV," Katie said in April.
Katie said she had determined that she owed it to herself to be in her "truest" and "happiest form."
"At the end of the day, I was like, 'Life is too short. I've gone through so much and I just want to be happy.' And so that's ultimately what we did; we owned our connection not knowing it would take us to this day," Katie told Kaitlyn Bristowe on her "Off the Vine" podcast.
After her breakup made headlines, Katie shared in her own Q&A on Instagram Stories what went wrong.
"This is a simple yet complicated breakup given that we were best friends before dating," the former bank marketing manager explained.
"We are on good terms so just finding a healthy balance of space in order for closure. At the end of the day, you just want the person you love to be happy and you support whatever path they want to take to find that."
Blake sparked dating rumors with Love is Blind alum Natalie Lee in July, but it appears they were just working on a project together in Nevis to save sea turtles. Natalie reportedly took an interest in Blake's wildlife conservation efforts and decided to join one of his trips.