How can I get over my ex boyfriend?

I'm 14. i dated this kid for about 4 months straight. after 4 months we broke up, then got back together. that happened 3 times. We had gone from being just friends to him hating me, and me liking him, to me hating him, to him liking me. Then back to the both of us liking eachother again. But were not dating. he's areally confusing guy in my opinion. and quite a horn dog. he dates alot of girls, and trys to get some, but the only one he actually has is from me. We first started dating in january. it is now almost august and I still like him alottt. Idk what about him..but i cant let go. I wanna tell him how i feel, but then I feel clingy. (bc that's one of the things he apparently didnt like about me. He said i was "clingy") He's always on my mind. I wanna text him and we do sometimes, but i wish he would first bc if i do first then i feel like I'm being annoying. I get really jealous of him dating another girl. i feel almost heart broken. I'm really tired of feeling like this all the time.. he's not like the most amazing hottest guy ever..but I feel as if I'm infatuated with him. i think he likes me, and 2 other girls right now. But we cant date. help?