I'm an alcoholic because of genetics. I'm an alcoholic because of my friends. I'm an alcoholic because of my difficult work schedule. I'm an alcoholic because of peer pressure. I'm an alcoholic because I was given Paxil.
In my experience it does not matter. I hate writing it because it frustrates me to hear it also, but really...what's the difference? At this point it sounds like you're in a pretty dangerous place. It might be best to think about the best way to quit, you can worry about the reasons later with a doctor and therapist. Good luck.