Hi Suzy, Welcome!
Well as an alcoholic its addiction, habit and mental obsession..mainly. The addiction part can be handled safely with medical detox. The habit can be broken through behavioral and lifestyle changes. The obsession? That's trickier. That is fueled by an emptiness of self that can only be handled by finding purpose, meaning and connection in my life. In other words, filling the spiritual void (and I'm not referring to God or organized religion).
If its a habit for you, you should be able to break it in a few weeks. If its an addiction/obsession, then you're alcoholic and you will need support and a program of recovery.