This. Medical speaking, no matter how much you drink, if you drink frequently you're an alcoholic. That doesn't need to mean you have a problem. But if it affects your health or social life, then you do.
I have to add, I am not a doctor. But my grandmother was considered an alcoholic in hospital because she used to drink a glass of wine every other day. I asked the doctor about this and he told me that you have to be considered an alcoholic if you drink regularly, because it has to be considered when planing a treatment.