SUBREDDIT: r/relationship_advice
TITLE: How can I [23/f] get more comfortable with my boyfriend [22/m] being friends with his ex?
POST: My boyfriend and I have only been together for 6 months. My bf and his first girlfriend broke up in the middle of his freshman year of college (he cheated on her). Shortly after he started dating the girl he cheated with. Shortly after THAT he cheated on Girl 2 with Girl 1. They decided they no longer wanted to hook up and just became really close friends after that. This was about 5 years ago, so I am not worried he will cheat on me, but I still find the friendship kind of weird. I support and respect the friendship completely, and I hope they stay close! I just want some advice on how I can feel more comfortable when they're hanging out. Any tips?
TL;DR: 
Boyfriend of 6 months is still close friends with his ex. I personally don't believe in maintaining relationships with my exes but I respect their friendship. I just want to feel a little more comfortable when they hang out.