I can't remember how many times I promised myself "Never again" and as soon as I felt better, the "Never again" happened again, and again, and again...... I watched my marriage, my children and my business fall from my clutches; never to return.
OP - don't be afraid to speak with your employer about your situation. You might be pleasantly surprised that they just might have coverage for what you are going through. I have met many men and women this last year that got honest with their bosses about their drinking problem and were blessed with treatment that they did not know even existed.
Being honest and completely transparent with your own self will bring you one of the greatest and un-imaginable gifts that you might ever receive.