You do need that impartial person to help you and your parents to find a solution that will work for all of you.

You said your parents think your Manic and that is why you have done these "things" ..

Have you been diagnosed with Bipolar ? and are you being treated ? Do you see a Therapist?

In all reality your 19, your parents can't just place you in a group home, your of legal age , They could ask you to leave there house/ your home..

I hope you find a solution sounds like a very complicated situation. Welcome to PC