ahh it sounds like they can't come to terms with the fact that you're growing up. What I would do, is save up as much money as possible, and move out. I'm 19 y.o and I moved out last summer, right before I turned 19. I couldn't completely afford it, but I mean... I had two jobs at one point WHILE I was going to college full time to pay for my bills. I mean, I'm getting myself in debt at the same time, but this is the time to get yourself in debt. Why? Because whatever you're taking in college is going to help you pay for that debt later on. I mean, I hate having the responsibility over my shoulders, and I didn't think I'd move out till I was out of College.
But I was forced to move out, so I could attend college two hours away. Trust me, if you NEED to find a way to make it work, you will. And if you need someone to talk to, you can talk to me, I can try to help you out, seeing as I'm totally in the broke college girl situation atm. I seriously wish you the best of luck though, and I hope you can work it out with your parents, or work it out for yourself.