I think maybe you're aren't quite over the hurt he originally dealt you and understandably so. The way he acted recently just sounds cowardly and pathetic and has probably added to whatever hurt you're still nursing from before. Maybe you're also a little annoyed with yourself at ever giving someone like this the time of day - i would try and put it out of your mind as best you can, think of it as like dodging a bullet. Let some other person put up with his nonsense, you deserve better and will find someone better. This poor fool won't be so lucky. Hope you feel better soon.