i understand that you feel a sense of shame, but in reality you did NOTHING wrong. this isn't your fault. we don't know what we don't know. he hid things well from you.
consider this for a moment......suppose he had somehow kept this all under wraps, and then you find yourself MARRIED to an active alcoholic......it may not seem it at the moment, but you are in a far better position now.
counselors have heard it all and they aren't in the business to say I Told You So. you don't have to announce anything to the world right now.