Thing is, if he's getting ansy about things, when you talk to him about other guys, there's only one reason or for it. He's still not over you. That's why he's lashing out. If he said some dumbass things to you, fine. Make him suffer. But to break up over it was a bit much. Sounds like he was stupid, and is paying the biggest price for it. Ask yourself, if he didn't talk about these other girls, would you still be with him?