Idk what to do 16F

So all of this started 5 months ago, i was with my boyfriend (now ex) who love bombed me in the entirety of the relationship. I was full of giggles and everything yk but i found out he was cheating on me with one of my bestfriends. All of this was revealed by her only due to guilt. And when i confronted him about it, i was met with rude insults thrown at me, him fake crying and all sorts of stuff. All of this really broke me but i can’t stop missing him and i hate it. Idk ig I’ll delete this later lol