Honestly, if you feel the need to be hospitalized so badly, just do what I did several years ago in a desperate attempt to escape from my family full of crazies and go to ER and tell them you are having homicidal and suicidal thoughts and appear distraught enough that they have enough reason to think that you will act on said thoughts.

It works every time.

While I think that if your parents are really psychologically abusive to you, they deserve to get the **** kicked out of them, the law, unfortunately, doesn't agree with many of my controversial opinions. Don't obtain a criminal record over the actions of insignificant people like abusers. Instead, do what I wish I had the courage to do and leave them, preferably while giving them the middle finger.