Ariel this is very serious your son is obviously having trouble controling his bipolar out-bursts. The worst thing he could do (and you obviously know this by the sounds of how scared you are) is stop therapy, he maybe doing this because he feel's it is getting him nowhere, or he is just at that age (not a professional opinion) what ever the reason it is still wrong (in my opinion). I'm not sure what you can do (it depends where you live) But I think for your sake and his you really do have to take the next step. Force him to seek help or get help to come to him even if this means hospitalization. Things can't get better on there own you already know this (as do I. I have BP.) Ariel you must protect yourself and your son, even if it is from himself.

This is only my opinion, I mean no harm or to burden you further. I hope you find the help you need Ariel for you and your son.

All the best.