Hi Brian. The first step--admitting you have a problem-- takes courage. And it's the hardest one to take. Pride and ego often get in the way.
My story was very similar to yours. I had/have a great family and career as well. But due to my increased drinking the edges were fraying and I could see disaster coming like a train. I had a full time career, a part-time job drinking and another part-time job covering it up.
I had to change.
I'd suggest initially seeing a doctor to get a handle on your health -- and a beginning of being honest with yourself and others.
By taking positive action, you will be able to let yourself off the hook and not have to live every day with fear, resentment and shame. Imagine that burden lifted off your shoulders.
Good luck.