Restraining Order Against Parents

I have a history of my parents (mostly from my mother) preventing me from being independent or moving away from them. I am being serious that they've locked me up in my apartment building refusing to let me attend college when I was living in Los Angeles, they've stolen my social security card from me, they've used my name and credit without my permission and have applied for things such as cal-fresh or social security benefits (among other things). I moved back with my parents after I've broken up with a boyfriend this February and every time I've tried to leave, whether to go outside, or even to visit friends out of town, they threaten me saying that if I go, they'd call the police saying I'm suicidal and am a threat to my own life, and I'm forced to stay home.They don't want me to go outside of the apartment/house and physically prevent me every time. They've done that in the past and even threaten to harm me or my loved ones if I tell anyone or call for help. My mother has my father convinced that I'm too "mentally unstable" and unwell for making my own decisions and they should have full power to decide for me. They have said this before when I wanted to attend college, seek help, or go to work. I managed to go to work, college and things when I was living away from them. I haven't told anyone for help and I don't think any of my friends could help me move out, given they live miles away. What is the best situation for me? I have taken videos where my mother is aggravated and seems to threaten me, but I don't think they would uphold well in court, and I've spoken to doctors about my situation when I was in Los Angeles, but since we're living in a new town, I haven't told anyone. I was attending therapy sessions before, but now my mother refuses to let me leave the place. I have a history with dealing with depression and worry that this will be used against me by my mother. The scary part is that my parents will lie about anything, which they did in the past when I was living with my boyfriend. I was already a legal adult when I moved away and they would show up to his house to harass us stating that she has a police officer who is working on a case against his family for allegedly taking me against my will and that they would be working to prove in court that I'm too mentally unstable to make my own decisions. I don't know where they could get this from, but they have always used things like this against me. They forged documents and would make his family and I believe them, but now that I broke up with that boyfriend, I am with my parents, and the cycle begins. I don't know what I am able to do to best prove this in court, because I'm afraid my parents will harm me if I look for help, but I'm going to try to file a restraining order. I know this post is all over the place or sounds odd, but I'm seriously asking for some form of help regarding me filing a restraining order.