Oh man, I feel you girl. I've been through this. Cut him off for good and don't even give him the time of day because he doesn't deserve you. You're not anyone's option and you're holding yourself back from finding true love. Block that losers number. I can tell you it's way easier to hate them and be hurting than loving them like that and letting them come in and out as they please. People who do those kinds of things are mentally unstable in some way anyway and eventually they drag your mental state down to their level if you keep engaging with them. Keep positive people around you and people who uplift you and make you feel good. This behaviour/ person is a form of negativity and that stuff is never good to have in our lives. Dont let it drag you down. He will always be like that in life and not just in relationships... it will translate into all kinds of situations.