He wants isolation..but is it just from me?

My (ex)boyfriend recently broke up with me. Prior to the breakup, we were on a on and off break up for about three weeks. Early on in the relationship, I made a few mistakes that concerned self harm, deep depression and mellow dramatic actions. He resents me for that and said that the relationship was all about me and not “us”. During that break we didn’t speak to each other, but when we did it was fine for a day, then an argument over something stupid would arise. When we had the break up conversation, he said that he doesn’t think the relationship would ever work, he doesn’t think its possible to regain lost feelings for me, and that his therapist suggested him to isolate himself for a while (he said a few months which I don’t believe at all). I asked if he felt better when we were on a break and he said he was indifferent about the situation. He has depression and anger issues so I’m not sure if it has to do with our relationship or not. After we broke up, I cried my tired eyes out in confusion of what I could do to get him back. I recently saw him at school looking all happy as can be. But was it all an act? I don’t know… Again, making me cry my tired eyes out. On Facebook it still says that we’re in a relationship and his profile picture of us two still remains. I am so confused, but I KNOW that I want him back in my life. But I’m terrified that he will become more attracted to other women and not me.