no words of wisdom, just some feedback that his side of the conversation is pretty lame. in all the time you've been gone, it doesn't sound as if he has taken any tangible steps towards dealing with his drinking and emotional baggage.
to me, an alcoholic saying that can quit anytime really means "i have no intention of quitting, i'm just going to hide it better from you"...
ever notice after relationship talks with an alcohlic in denial how that tired feeling washes over you? as if you are speaking a foreign language that they don't understand?