Oh honey... (((hugs))) I've been there. At one point, I was basically PUSHING my AH at a (single) woman I knew he was attracted to. At another point, I was wishing he would be physically abusive. Why.
Because I thought I didn't have the right to leave otherwise.
I didn't leave until he became physically abusive. (Although I rationalized years of sexual abuse.) That was approximately 18 years after I first thought "I wish he would just cheat on me with Angela, that way I could justify leaving."
You ALWAYS have the right to leave.
Always.
You always have the right to choose a life free from addiction.
You always have the right to choose a life that's healthy for you.
You don't need to wait.
There's nothing magical about him doing something that every person in the universe would agree is a good reason for you to leave. You don't have to have every person in the universe on your side.
You only need to know that this is not how you want to live anymore.
That alone gives you the right.