How could he do this to me if he said he loves me?

[Mircat]

You are such a controllable naive girl that any abuser is happy to have for a girlfriend. You learned to deal with his abuse. Why? If he loved you, why didn't he learn to live with some of your crap and not argue about it? That's because he didn't love you, he has no intention of changing anything about himself and expected you to do it all. That's what abusers do.

You had broken up so you had no right to ask him if he made out or had sex with anyone. He was, at that point, your ex. Asking that just lead to him being rude and I'm sorry to say that wouldn't have happened if you had butted out and minded your own business. His business is not your business and your freaking out was inappropriate.

Move on and be damn glad he is with her and not you because you don't need to be in a relationship where you are fighting and being lied to. Never talk to him again and do your happy dance you're free!