In Need Of MAJOR Advice Help!?

Ok so here's the situation, I really like this guy I mean MAJOR crush but the thing is im a little bigger than the other girls in my cl (im not fat im chubby) and ive had the biggest crush on him since forever. We occasionally talk and we laugh in gym and everything but we never actually had a conversation. I wanna show him that even tho im not '' skinny '' I still have a nice personality and im outgoing and I know how to have fun. I wanna impress him and I wanna know how I can catch his eye. I've had my heart broken WAYYYY too many times already so I wanna do it in a way that maybe spare the heartache. Even if it hurts a lil I wanna catch his attention. So any advice towards that would be great!