I'm so sorry. It hurts.
The one thing that is reassuring is that here others understand your need to ask him to leave. We don't question it. We don't think of you as a bad parent for making a decision to save your own sanity and allow him to face the consequences of his disease.
You and your dear son will be in my prayers. I pray that this will be just a temporary setback and that once he realizes that a sober life is a better life....he'll get back to it.
Please......take care of you.
gentle hugs
ke