is there any way you can successfully influence a loved one to quit drinking? No.
and want to quit drinking? No.
if you show them that you yourself are in a pit of despair and they are the ones who have put you there? No.
Sorry, but the answer to all those questions is no, if he is an alcoholic. You didn't cause it, you cannot control it and you cannot cure it. I know that's hard to hear, but it's the truth.