Knowing that you are in an unhealthy environment with terrible role models is already a good start to living life differently from them. Now the next step is to find a way how to get out of your situation. But tell you what. I have a friend whose dad was absent in her life until his death and mom is mentally unstable. My friend did not live away from home because she couldn't afford it and she was a minor then. But she started working at 12 years old to support herself. She did odd jobs, selling newspapers, cleaning lawns, houses and the like. That literally helped her to be out of the house most of the time. When she reached the legal age, she left home and worked abroad as a nanny and English tutor. She managed to send herself to college while working. She is now a primary teacher in another country. She sends mom financial support, goes home for short vacations whenever she fancies, has traveled to loads of countries twice on business class - a luxury she was able to afford because apart from teaching, she also does tutorial jobs. Yes, she has hang up but you know what, she has seen a counselor to address it. She's still healing, but she has definitely gone a long way. In fact, she can be passed as a well-adjusted person had she not told her story. What I'm saying is, you can very well be your own person. It takes the will power and courage to rise up above your situation. It may be hard but it is possible. All the best to you!