The denial on his part may be his way of protecting you and making things right in his own mind. Sometimes people think if you are not continually falling down drunk and a bottle perpetually in your hand, you are not an alcoholic. I have found many non-alcoholics that feel this way. But count your blessings, give him a big hug, and thank him for being the great understanding guy that he is. And go for the gold, leave the bottle behind.
Padraic