How do i get him back?

ok, i know its just one more of these questions but its important to people. so well im in high school so its not to serious but i have problems with guys because im curvy and there lusty, and i hate it. this is high school and i don't want THAT kind of relationship. but this one guy, he didn't push me and he broke up with me because he didn't want to sucb. and i thought i was over him, i really did but im not over him. and hes changed some so now i like him even more then i did when we were dating. so i dont have that much relationship experience and such and im scared of asking him because i dont want to lose the little friendship we've regained and, i just dont know what to do. i literately feel like im sliding down a steep hill covered in ice and i cant get a hold of things. what should i do? how do i go about this?