aussiegirl29,
Well, I'm no expert, but I think 2-4 glasses of wine most nights might be a bit much if you want to stay healthy. If your wine glasses look anything like mine 2-4 glasses could actually be more like 4-8 of the glasses that are considered a single serving size. I think 4 or 5 ounces of wine is considered a glass. So that might be something to factor in.
I used to drink quite a bit and was concerned where I was headed with that habit. The question of whether you're addicted to alcohol maybe could be answered by how easily you could skip the wine for a few days. I have gone through stages where I have had something to drink most nights like you and decided that I would deal with it by having a rule that said if I've had alcohol one day I'm going to go at least the next day without any. Then see how you feel. If you have difficulty coping without the alcohol, you could have a problem.
Rachel