I already posted in your other thread, I again wish you well and urge you to seek help for yourself and your son. Al Anon meetings, and Al A Teen are a good place to start. You have no idea the monster you are up against.
And, please, click the link that Scott has posted for you. The "Friends & Family of Alcoholics" section has many people who have gone through the same thing and will talk to you. If you read the threads called "Sticky" at the top of the page after you click this link, you'll find lots of resources to help you.
Good luck - here's that link again:
Friends and Family of Alcoholics - SoberRecovery : Alcoholism Drug Addiction Help and Information
You'll see 15 or so threads that start with "Sticky" - read those to start.