WHAT DID I DO WRONG!!!!!!:( PLZ HELP?

i honestly don't think you did anything wrong. maybe he heard a rumour or maybe he just thought that (some of my guy friends do this) if he broke up with you in a hard way you won't want him back. i know it;s a **** thing to do but some guys a douches.maybe he thought you were going to break up with him and he thought that if he broke up with you it would feel better than you dumpin him. there's a lot of good reasons. there's no way to win him back but be yourself and the person that he liked that he dated.