Is he over his ex?

Okay so my boyfriend had a girlfriend that lived a state away from us and they recently broke up. Well about a month after they did, me and him started to date. She has now broke us up 3 times since we have been together. So need not to say, I hate her. I can't stand her. But he blocked her from everything so she couldn't do it a 4th time. So she started to write me talking about how I took her bestfriend away. (My boyfriend). So I apologized and everything.  But lastnight he said he wasn't over her. So I stated to cry. And he said since he saw the way I reacted, he knew he was and that he was in love with me. What do I do?