Answer Please! Why did he do this?

Well it sounds like he either regrets breaking up with you, or he was being a jerk and trying to see if you still like him. Sorry. Some guys are like this. I've had my jerk moments to believe me. Sometimes guys just want to see IF they could still have you IF they wanted to. On the brighter side tho, it could be because he was testing the waters because he still likes you. Having may have complicated it more ya know?