David, tell your roommate to relax.  It could be worse.  
Like, for example, when 
I get drunk, I have the tendency to introduce myself by another name, not recognize acquaintances, and take pictures of people's chest hair.   

  Oh, and I black out every time I drink.  Now that's a sign of problems, is it not?
Oh, and drinking after a 5PM class?  Tell your roommie that it's totally European of you to do that.  And, um, hasn't your roommate ever heard of happy hour?