I don’t know what to do.

My dad is getting married soon. He wants me to call his fiancée my mother. I can’t do that! It wouldn’t feel right, and she’s not. I like her, don’t get me wrong. Her psychotic Husband who she ran away from because of abuse is making up shit stories to make her feel guilty and get under her skin. She needs to press charges and get custody papers over the kids before he can but she’s not doing anything. I’m stuck in the middle too, in everyone’s way. No one knows what to do with me. My grandparents don’t want me home alone even with them there, because they don’t trust me or anything. My dad can’t work because he has to stay home with me or I have to go with him, so I’ll be away from home for a week every so often and then I can’t keep up with my meditations and I won’t be able to speak to my boyfriend, which is vital because of his depression issues. I’m moving back and forth between states and I’ll only be going to my old school for a few weeks, then I’ll have to enroll in a different school in the middle of the year. All the other kids (three) completely agree that we should just stay at my dad’s girlfriend’s grandparents’ house but the adults aren’t letting the adolescents have a say in anything. I don’t know what to do, how to help, or how to handle this.