Abused & Neglected..I need to move out!!

I’m about to be 17 years old and I want to move out. I’ve heard of something called an annonment (however you spell it). I can’t stand being at home any longer. I’ve already commited suicide once. I was put on anti-depressents and ran out,when I told my mom to refill them she never did. Then one day I was home alone and couldn’t stand living anymore. I begged her to get them refilled and she still hasn’t. She believes that if I have went this long without them that I don’t need them. I was told I could get her for neglect but dont know how. Yes, I have been physically,emotionally,and verbally abused. I have been abused since I was like 12. It was by my uncle(moms brother) my step dad and eventually my mom. She would never do anything about me getting abused my my uncle. Then one day I got molested,that was the only thing she took seriously (not by my uncle). When I was sent to a mental hospital for my suicide attempt and they found out about my molestation they said I should go to therapy. I now have problems trusting guys/men. She never checked into it,and they told me that I need to talk to a psychiatrist for my suicidal thoughts and such,she never checked into it either. We fight all the time,and she treats me like a dog. To her im not a part of the family any more in my eyes,and all she cares about is her boyfriend and the baby they had together. I want to move out. Im afraid one day something bad will happen to me and I cant take it here anymore. I NEED HELP!!