* hugs*

I'm in a similar situation... in that i don't want to go home but have to.

Our situations are different, but keep in mind a few things.
First that you do need some help, maybe suggesting an alternative such as therapy would help to convince them.
Also, acting in ways that they approve of even if you hate it, to convince them that you are capable of getting yourself to that therapy, and get better without them whacking you time and time again.
Even if that means taking blame for things you didn't do.

loads of hugs, good luck