Welcome to the site. You're in good company.. hah. A lot of us have big chunks of time we wish we could take back. Addiction is a bitch man, no matter what your poison. Mine was H.
Welcome to bL, be sure to take a look over in The Dark Side as they are very understanding, and many can relate to your addiction problem. If you are looking for advice on quitting drinking for good Other Drugs would be a good starting point.
You've recognized your problem, and that is paramount, between support from the site & and creating a plan with your doctor to slowly ease off, I'm sure you can go on to lead a sober, happy life.
If you have any technical questions about the site, or just need someone to talk with you can feel free to use the PM me link in my signature.