should i ask him to prom?

[Junifer]

Ok so I ride the bus with this guy. He has been sitting with me from day one. He Doesn't go to my school but we pick him up for trade school. But anyways He always sits with me on the bus and he used to try to hold my hand but he stopped. When I sit there he will put his hand on my leg then pull away fast when i look at him and laugh. Now im not ugly but im a little over weight. Im loseing weight now. But I want to go to prom with him so bad! But i am afraid of rejection. We talk sometimes on facebook. But because he does not go to my school i have to ask him to my prom. Should I or does he just mess with me