I think my family is causing my multiple personality disorder and I can't even tell them.
How do you think your parents caused that?
They just cause it through the way that they act.
I get your point, but you should always be honest with your family. You should tell them you aren't pleased with them if that's the way that you feel.
My siblings are the problem too, they are bullies and they don't give me any positive attention. I only have two friends who  really understand the pain I feel.
Perhaps, just once, you can sit down with your entire family and tell them all how you feel. I don't really think that they want to hurt you and they may not even realize how they are treating you. I think this could bring you closer to your whole family and really show you how much they care for you.