Living with the devil...

So what exactly do you do when you live with the devil itself?
Today I wrote a tweet, that said, "I can block out every sound that surrounds me, but not your voice.. =/". One of my bestest friends in the whole world, which knows about my ED, thought that the "voice" I was talking about, was the one of my ED, 'cause lately we've been talking about it. But we (yeah even me!) got really surprised when I told her, that it wasn't my ED voice, that I was talking about. It is my AUNT'S voice I can't block, and she's affecting me so much!!! She yells everything that comes to her mind that is offensive to me! That is really awful, makes me really sad, and it triggers a lot my ED voice, which follows her. 
I really wanna stop living with her, but it would 'cause a WWIII in my family...and I would have to go back home, which I wouldn't like either... I'm tired, really tired of feeling awful every single day...