Help. Suggestions. Please.

Hello, I am a 15 year old girl. Graduated from high school, I now work a part time job and go to college. I do not get along with my mother and stepfather and have a hard time trying to live with them. For a while I have been spending my pay checks on food for the household and paying bills when my mother can't. She has been married a year to my stepfather who is only 24 while she is 39. She is childish and my stepfather is also still a child. My stepfather doesn't have a job and my mother is on unemployment. I know I could have a better life elsewhere and my mother won't let me leave. I would go live with my father but I can't get my desired education at the college in the state he lives in. Also his house is filthy because they have 4-6 dogs they let roam the house and defecate and urinate everywhere. HIs Wife doesn't clean and her daughter who lives there is on drugs. I don't think either of the environments are stable. I have major depression and anxiety and I was abused for a year because my mother had a boyfriend who had anger issues. He was only 21 and also never had a job. My mother has multiple guys closer to my age in and out of the house often. I know she tries to be a mom but she's ruining me. I've been in an institute for a suicide attempt and if I have to live here much longer I'm afraid it may happen again. I need help. I don't know what to do. I've looked into emancipation but I don't have a good enough income to support myself. I'm stuck. What do I do?