How do you get over someone?

there was this guy that i was obessed with i mean it was controling my life. We did go out for a while. then we broke up cuz we didnt really see each other. All we did was tex. but he broke up with me. and so for the past 6 months i tried my hardest for a second chance. it got to the point we talk then we would fight, talk then fight. so now he kepts telling me in stupid, fat, ugly, not worht it, he dosen't care about me at all. or that he made me cry. I cant stand to look at him anymore he just ticks me off so much. then i stop and think about all the good times we had then i start likeing him again. My heart tells me hes worth fighting over. My head tells me no hes not why are you wasteing your time. I know there is someone better..........Why can't i get over him? And how? BTW i do live in a small town.