Hopes,
You are definetly not alone. We are here for you and we get it.
It's just my two cents, but I would wait a while before you even consider whether or not to tell him. Give yourself a little time to talk things out here and get some feedback before you involve him. Let yourself have something that is for you. That's what this is really about.
Telling him won't change him and his drinking. You will learn a lot from reading here (I sure have). In particular, the three Cs:
You didn't cause it
You can't cure it and
You can't control it
You say your AH is "high functioning" - in what way? How is he functioning as your life partner? Is your family life functional?
I used to believe in that term "high functioning" - but now I agree that it is just a stage of the disease.
Keep posting, we care about you.
Take good care of yourself.
Hugs,
MamaKit