What would you do in this situation?

I basically home hop over the summer which means that I’m always away from home and at someone else’s house. The reason I do this is because I do not enjoy being with my mother, what so ever. This summer I got into a relationship (my boyfriend is nineteen since the fourth of december and I will be seventeen on the second of march.)
When school let out for the summer I stayed with him and my mom was fully aware that I was there. My mom and I needed to move because my dad owned the house we’ve been living in and since my mom and dad have gotten divorced, my dad decided to make us leave. After waiting so long to move, my mom, myself and my boyfriend have moved seven hours away to a small town near Oregon. We moved here because my mom needed housing because she doesn’t make enough money to support herself because she says, “No one will hire me because of my record.” and she is also on welfare. Anyways, I need to be here because she says that she won’t receive her welfare and housing if she cannot prove if I am living here with her. She is a very odd person and she screams at me a lot and has made me miss a lot of school due to this move. I want to find a way that I can get away from her because personally, I believe that she is putting me under a lot of mental stress. I added the part about my boyfriend because I wanted to know if my boyfriend could get in trouble if I live with him. But I’m not sure because our parents know that we’re together and my mom let him stay with us. I really don’t want to hurt my mom because that’s my mom but I really feel that she is using me to get her benefits to make her life better. So, I guess my question is, how do I go about leaving my mom and going into a safer enviroment by living with my boyfriend and avoid being put into a foster home, etc?
Also, please do not tell me that I only have to wait one more year to leave. I’ve just about had it with my mom and can no longer take it.