15 year old needs advice on a major family problem.?

So, my parents are two shakes away from being considered the Anti-Christs. Thanks to them, the only social life I have is the seven-ish hours I'm at school. They took away my phone, saying they "couldn't afford it", which is utter crap, considering they want to go out for dinner every single night. Then, they took away my computer indefinitely, cutting off me being able to e-mail and talk to my friends. The TV is pword protected and they never watch it. I have nothing. I cant go anywhere. I'm 15 years old, for heaven's sake, and they have some babysitter pick me up from school and watch me until they get home. Neither listens and refuse to change it. Everyday, the temptation to say "screw it" and leave rises. My boyfriend already said he would take me in and watch over me, make sure I got to school, etc. etc. But my parents despise him, which I don't understand. I dont want him to get in legal trouble, but it's getting harder to stay with my parents. Can somebody advise me?