Am I detaching because I'm angry or because I need to?

I have been going back and forth with the thought of telling my mom that I no longer want to be a part of her life if she is actively drinking. To me, that means no contact what-so-ever. Am I doing this because I'm angry at her or am I doing this because it is what is best for me? Sometimes I wonder...

Honestly? The thought of not talking to her or dealing with her crap is a pleasant one, a happy prospect. I feel...