Am I an alcoholic or just reading to much into it.?

I drink whenever I feel depressed since I'm never unhappy when I'm drunk I'm just sort of numb and unfeeling, I drink when I want to sleep because it knocks me out if I drink enough. I drink whenever the opportunity presents its self just because I hate being somber, I drink when my girlfriend does or says something stupid, she is a dumb drunk and has tried to fight me on more than one occasion while intoxicated and the only way I can cope is to drink until she doesn't bother me any more. so am i an alcoholic?