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.
Can't be bothered with sorrow
And I can't be bothered with hate, no, no
I'm using up the time but feeling fine every day
That's why I'm telling you
I just want to celebrate another day of livin'Rare Earth