What do you do when you cant be with the ones you love because of someone else's selfishness?

I am 15. going on 16. I have a mother that is WAYY over protective. She trips off me talking to boys. I will be 16 in september. I have a bestfriend who is a boy. I only have 2 people who i really call friends. He is going to Iowa and she might be going to kentucky. I only have this summer to spend with them. She always is in my face saying im fast and shyt. I dont tawk to her about anything. She doesnt trust me and i dont trust her. She acts like im going to sleep with every boy i get around or something. I am a virgin. I dont trust anybody enough to have with. Im not her. It seems like she tries to keep me away from the only things i hold close. She wont let me have a boyfriend. I bearly go anywhere. I dont ask to do anything basically except to be with my friends. I will be starting a driving camp soon (which my step mom is paying for) so i barely have to the end of july to be with them. She has a fit about taking me to b with them and they dont even live 5 minutes away. As long as she has her husband she is fine. She doest care about anyone else or their feelings. She is a selfish female. and honestly i hate being around her. I hate that she is my mom sometimes. She wont leave me alone and she constantly is getting on me about little things. I cant take it she drives me crazy. I just know by time i have kids she wont be a part of their lives. I dont want them going through what i had to go through. ANd i dont want my daughter having to be worried about what bad things her grandmother will have to say. Its almost to the point where its as if she only cares about whats important to her and not whats important to anyone else. She is making mii summer horrible. She makes me so mad sometimes where i cant breathe and i have to hold my chest. I think i am going to go off on her one day. She constantly tries to judge me and doesnt even know me like she think she does. what should i do?