I drink alone, yeah. I have long and stressful days and I'll just make a cocktail or something. If I have friends over, I have friends over to enjoy some drinks; if I am alone, I'm alone. I try not to read too far into the alone part. I drink 3-4 nights with sober exceptions, sometimes I get "drunk", sometimes I just relax. I'm worse than you, though, from the sounds of it...
I agree with Kinetik when he says "that's so sporadic that I would hesitate to call it drinking at all."
Drinking isn't a beer or a glass of wine. Drinking, when mentioned with concern, is chugging vodka or whiskey every other night until you just pass out. And I've been there before, which is something I admit with hesitance.