This man makes me soo angry!!?

Men play around because they can, so make it clear that he can't treat you like that...if he has a girlfriend then let him go back to her. Don't let yourself be the other woman...don't decieve yourself...he is not with you because he is unhappy in his relationship..he is doing it for the thrill outside his normal routine, and he has something safe to fall back on. Cut the ties and find someone free to be with you that deserves you and that you can have a proper relationship with.