I was once told that a good way of knowing that you maybe be an alcoholic is when you find yourself wondering what the definition of an alcoholic is.
Try quitting for 30 days. If you manage with no difficulty and with no ill effects, then you're maybe not alcoholic. You do however have a drink problem. Drinking every night is damaging your body and is making you mentally and physically dependant. You may think you are coping and in control now, but you're not.
There is a reason that medical advice is to take a couple of days in a row at least a week off and to not drink more than 3-4 units a day. More than that and you are damaging your body and becoming dependant. It may take a while, but you're certainly at the "problem drinker" stage.
You can either accept that and cut back or quit or you can post about it and try to convince yourself that its not a problem... because you dont want to give up your... addiction.