Diva, I get your concern. I'm the wife of a recovering alcoholic and the sister of one who will drink herself to death. I do not have contact with her but am kept up to date by the family grapevine.
It is normal to care. You wouldn't be human if you didn't.
At the same time, getting wrapped up in concern doesn't help him and it hurts you by keeping you enmeshed in his situation. Say a prayer or send good vibes then stop and move on. It's hard, but you can do it and not feel like a bad person.