No matter what you do about reporting B, please, please, please, make it very clear to him that you want nothing more to do with him. And then stick to it.
This broken wrist should make it very clear that B wants nothing good for you. Next time it could be worse. Get him out of your life before its too late.
Seems I've got to have a change of scene
Every night I have the strangest dreams
Imprisoned by the way it could have been
Left here on my own or so it seems
I've got to leave before I start to screamJoe Cocker