Of all the things I learned in recovery, one of the most important for me as a double winner is: "First put the oxygen mask on yourself."
I need to focus first and foremost on my sobriety. I cannot afford to let my codependency divert me from working on my personal recovery from alcoholism.
While I might lapse sometimes applying the Al Anon principles to my relationships, I cannot afford to slip when it comes to drinking.
Keeping this in mind, the most important boundary I have with my best friend is that I will not hang out with him when he is drinking. I have no desire to drink but the emotions I sometimes feel seeing him out of his mind, in a blackout or just plain acting stupid are a potential trigger for my alcoholism.
I have sometimes dropped by briefly when he was in a black out binge but I remove myself from the situation asap.
Oxygen mask on first: I am an alcoholic and my codependency could lead me to a relapse.