Does he like me??????????????????????

Alright there is this really cute boy at my school named Pyper and I like him sooo much and everyone at school knows that. He used to think I was hot and he tried to talk to me before but I just ignored him. Now he does not like me at all and thinks I am ugly. I don't know what made him change his mind? Now I like him so much I am always trying to get him to notice me, but he is to worried about this other girl and now I am crying all the time and trying to make myself prettier to get his attention. Should I lose weight even though I am already considerd small. Geez I do not know what to do so PLEASE help me out here. I can't get my mind off him and he is the only guy I want to be with.