You don't have to agree with everything your aunt says. Because you are a minor and in her home, you do have to be respectful and abide by the rules even when they suck and aren't fair and you disagree with them. I've also been in this situation--my foster mother and I went around and around about what was fair and what wasn't. I got in the least amount of trouble in the house (never partied, took AP classes, extracurriculars...) but was grounded the most because of my wicked mouth. I know it seems like, when bad things happen, they're never going to get better, but they do. I hated it when people said that to me--things seemed so intense to me in my teens and twenties--but in high school, you'll always find different friends and new situations. That's almost a guarantee.

Hugs to you.