Advice on moving on from an ex?!?

so me and this guy went out for almost a month and we started talking two weeks before he asked me out and he REALLY liked me. but every week in school he would get pretty distant and also he would slowly stop texting me as much. SO we broke up cause he wasnt sure if he liked me or not? which made no sense. and i wanted to be friends with him but i feel like he doesnt evn care bout me. and he told my friendss it would be hard being friends with me cause im attractive . but everytime he says something to me i FALL for him all over again and i just wanna know what i should do to move on somehow . :/