Am I an alcohol abuser?

I worded the question to specifically not mean alcoholic, which means living without competence in the absence of alcohol. I started drinking weekly about half a year ago. Started to be a casual thing with some friends, and it's becoming like a tradition. The amount I'm drinking is enough for me to grope a pretty girl (but they are friends and were all drinking the same amount so I'm not in jail right now). I really enjoy doing it and function normally without problems when I'm not drinking. Is this substance abuse?