I am in a relationship with a boy who is very very over protective of me we are 14. what should i do?

It isn't good that he is so overprotective. You should talk to him, and if that doesn't work out, break up with him. If he really wants to change because he loves you; he'll chase you to the end of the world. If he doesn't, then you'll know you made the right decision and shouldn't regret it. Grabbing you like that can result in worse actions later if you let it happen.