to SR. Coldfusion and Carl beat me to it.
Quit starting right now for 2 or 3 months without any support of any kind (make sure you bookmark us though for future reference). If it is easy, then you are just a heavy drinker (it does not mean that you won't cross the line to alcoholism at some point though. If you find yourself obsessing about alcohol and struggling, you have your answer.
Note: if your belly made a flip at the idea of quitting right this minute and you immediately thought: I'll start tomorrow or made some excuses to keep on drinking then you very probably have a problem.