Good for you for deleting him Concerned. I've unfriended a person or two for no particular reason other than the sick feeling I would get when I'd look at their page or they'd post something on my page. I felt bad about it for a little while but then got over that real quick.
To tell you the truth, the actual behavior of the alcoholic/addict or doing things for them did not affect me as much as that sick, panicking, the-world-is-crashing-in-around-me feeling I would get when I THOUGHT the person was drinking or drugging. It is just a gut reaction in me because I know what drinking and drugging spells. That panicking nearly drove me insane (though that wouldn't be a long trip LOL). Any time I feel that with someone in my life, I KNOW immediately that someone needs to GO. But it took me a long time to get to this point in my life.