i know what your talking about i've been there and done that. To me it sounds like this guy is playing with your head alot. One day yall fight, one day you stay friends, one day this one day that. Your gonna have to want to stop thinking about him. And its gonna take alot of effort from your side as well and into helping yourself getting over him. Sitting down and thinking about him what good is it anyway. It will only make you worse is that what you want? best advise is try to keep yourself busy hang out with your friends alot more go out and met other people.