How to get this boy to like me ? :(?

Ok so there is this boy I really like him but he treats me really bad I want to cry( I'm not old I'm below 16) I don't understand I really don't I acted nice at first but then he says stuff that make u wanna punch him in the face and I being me yell at him but I really like him idk why tho hes nice to my friend but I know he doesn't like her but what did I do am I not pretty tell me please ( I'm. 5'2" I'm. Not skinny but I'm not fat I think I'm chubby but not like ewww way like baby fat way I have waist length brown and blondeish hair with big hazel greenish eyes I also wear glasses Helpppp )