((((((((Lilacs)))))))
I know too well how hard this is for you right now. I promise you things will get better.....take a deep breath and know that no matter what, your son knows you love him and whatever else happens from here on out that is something he needs to trust in is your unconditional love.
You need to set up your own peramiters (sp) and decide what you will and what you won't tollerate. What you can and what you can't do to help him get through this. To do this you may need to edducate yourself in just what you are dealing with, get informed, don't panic he's not a goner at this point and no amount of argueing with him is going to change anything now. Just read, get informed mabye go to Al-annon meetings, you do have younger children who will be facing the same problems in the future.
Funchback has given you some good places to start. You can also go to your local library and check out some books on the subjects. One thing you may really want to consider is material on Co-dependancy. Melody Beaty has some good books out that I recomend, one is Co Dependant No More and another really good one is Letting Go.
Here is another web sight for you:
http://www.alcoholics-anonymous.org/default/en_about.cfm
I hope this helps and my email is always open if you need to ask me any questions I'll be glad to help you as best as I can and if nothing else I'm a good shoulder and have big ears! Remember deep breath, all is NOT lost!
(((((((((((((hugs!)))))))))))))
Katie