I'm sleeping in the closet...?

I'm 17. My parents and I are living in a one-room apartment. They have the room and I am sleeping in a closet. I'm writing this now because my dad just woke me up and I can't get to sleep. My legs can't even stretch out in here and the air circulation is terrible, lol.

I haven't gotten decent sleep since we moved here and I have classes very early in the morning and I have to take the bus so it's even earlier. Sleeping here is no longer an option because my dad goes in and out of the house at all hours of the night even when I do fall asleep. He always slams the doors and bangs around and turns on the brightest lights which are bright even from the closet.

My question is: where else can I sleep? I don't have any friends to stay with. I'm considering one of the woody areas outside that I hike at, but I'm afraid that there will be drunks/homeless people and I'm female. Where do I go?T__T