Re: I'm back with another prob...
I personally believe that you dont have to listen to your husband in practises that are unislamic in nature. Therefore I would not buy him any alcohol. If he insists that he used to buy me things, I'd say I will go ahead and buy him some soda and stuff, but not alcohol. I'd also insist I go with him to do the buying. Then he can pickout any reasonable drinks.
Anyway, he needs help with his addiction, and if he refuses to get it, its not going to be a pretty picture. Who can you talk to in terms of intervention with him? Perhaps a famliy member that is close to him or a good friend? Someone else needs to talk to him because he is refusing to listen to you at the moment.
If worse comes to worse, only you can make he decision whether you want to leave him or not. Maybe some time away will be a better option than just leaving him right away. Perhaps it will cause a reconsiliation later. I'd definately try to meet a counsellor as well, before thinking of such options.
I pray that you find an amenible solution.