Even though Nick Viall has officially moved on from former Bachelorette Kaitlyn Bristowe — fans couldn't help but notice how frequently her name was brought up throughout his entire season of The Bachelor.

It's hard to let go of the dramatic, rollercoaster relationship that Kaitlyn and Nick once shared. So, what really happened between the two — long before the reality star ever met his now-fiancée Vanessa Grimaldi? Let's break it down.

MORE: Vanessa Grimaldi Was an Actress Prior to Joining 'The Bachelor' — See the Pics!

Nick showed up halfway through Kaitlyn's season

The 36-year-old rubbed Season 11 contestants the wrong way when he showed up during the fourth week and immediately caught Kaitlyn's attention. The two had established a flirty friendship prior to the brunette beauty landing the gig as The Bachelorette, but never met face-to-face. Nick admitted he would regret it if he didn't get a chance to meet her in person.

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Nick feuded with frontrunner Shawn Booth

Kaitlyn didn't do the best job at hiding her strong connection with Nick in front of the other men, which made the season's frontrunner (and eventual winner!) extremely jealous.

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Kaitlyn and Nick had sex on their one-on-one date

Kaitlyn broke the cardinal rule of sleeping with a contestant before the Fantasy Suite.

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Kaitlyn suffered from extreme guilt after telling Shawn she slept with Nick

She ended up telling Shawn — and no other contestant — what happened with Nick. Shawn felt betrayed and hurt, but ultimately put his anger aside.

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Kaitlyn picked Shawn over Nick in the finale

For the second time, Nick got rejected on national television. Kaitlyn broke down in tears telling him that their relationship was "so real" and she meant everything that she said to him throughout their time together. Nick later shaded her for letting him go through his entire proposal speech before she turned him down.

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Nick threw the engagement ring in the limo ride home

Kaitlyn and Shawn made fun of Nick on Entertainment Tonight for throwing the engagement ring. "We were joking that he did an underhand toss," said Kaitlyn. "We're like, 'Oh, we totally would have went overhand.'"

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