Why is he playing these mind games after our breack up?

Ouch? this guy wants to be single then you let him born free. Now he is jealous about you with Matt. and he does not know what to do next? He is confused and still has a feeling for you. So, you give him time to think over. Do not date anyone yet if you still have a feeling for him. But, if he does not make a move then time for you to move on. Good luck.