Aef.... I have done crack for about three years. I stopped. While in between I was not violent or abusive. It is an individual thing.
I agree with everyone. Get out now.
But know one thing... In doing what you need to don't ever blame yourself.
I can tell you on crack .... It's a feeling that is not easy to replicate on any NORMAL life experience. It's fake. It's a lie. It's nothingness.
You man is not weak for succumbing to it. You are not weak for leaving. It's an addiction. And when it takes hold its not easy for anyone.
I wish you the best and please put yourself first.