Angelus, I've actually had my step-mother TELL me she didn't stop over because she knew I didn't have any Vodka in the house. Another friend? Is too drunk now to even leave her house much. I don't KNOW anybody that doesn't drink except two married men whose wives would frown on my suddenly befriending their husbands.
My personal opinion is that your friend probably drinks more than you think he does... and wants his "party time," which he cannot have with you. I doubt he cares less about you.... he just cares for his drug more. That's the nature of addiction. I could very well be wrong... but I've been there, done that and have seen it happen with me and to me over and over again.
Drinkers like to drink. Period. End of story.