Welcome to the SR family!
Thank you for introducing yourself to the rest of the family. We are glad you are here.
I am sorry that your son's alcoholism is what brought you here. I want to encourage you to keep reading and posting as much as you need. We understand.
You will find lots of information and support for yourself here. I recommend reading in the sticky (permanent) posts at the top of the forum pages. They contain some of our stories and loads of wisdom from members who have walked the same path's we find ourselves on.
I can answer a question for you. You've asked your son why he drank/used after he said he wouldn't, right? He does this because that is what alcoholics/addicts do. It's frustrating to see them say one thing and do another, isn't it?
Be patient with yourself, you are beginning to find ways to stop enabling and start taking care of yourself. One day at a time.
Here is a link that help me and many other members:
http://www.soberrecovery.com/forums/...l-problem.html