What did I do this time?

Chris broke up with me about a weekish ago. He gave me no reason. I am sitting here wondering what I did. I know I screw up alot but he was always going on about fighting through it and compromising, yet he was the one who just broke it off for no reason. I'm hurting all over and I don't know what to do. I have thought over and over about what I have done wrong. I am fine with the break up until i see him, then it hurts, and he seems completely fine with it. He tells me to go date other guys but then goes and posts crap about me on facebook when I do. Now I have herd he is going around talking crap about it... it hurts... alot.