Not sure where to post this, but I'm looking for advice on how to support a friend who is struggling with alcoholism.
He is an old school friend who moved away a few months ago, tbh he has always had a drinking problem but I had no idea of the true extent until he confessed all to me recently. He has told me that because of alcoholism he has lost his job, partner, home, etc, now he is sleeping on friends floors, in hostels etc, and spending all his time and money on booze. He tells me he drinks around 18 pints a day, sometimes more, and he was arrested for assault recently.
I have listened patiently to everything he tells me, and told him I'm glad he is being honest and facing up to his problem, but I don't know what else to do..he is very, very depressed and says he can't see a way out. He has children who he has given up on, he can't face seeing them anymore. This saddens me, as a child of an alcoholic I know the pain they must be going through, losing their dad to alcoholism.
We email each other regularly, he tells me he has been going to the doctors, seeing councellors etc but nothing seems to be working for him, and he can't take it anymore. He confides everything in me....but I feel utterly powerless to do anything, I wish I could help but what can I do 
I know that alcoholism is a disease, this is why I feel powerless to help him when I am so far away, and his family and the people close to him can't even get through to him. I know it sounds horrible but I am tired of his self-pity, the trouble with alcoholism is it makes people selfish, its all me, me, me...no thought for kids or loved ones. On the one hand I want to be there to listen and support him, but on the other hand I can't help but feel angry for what he is putting his family through.
What can I do to help him get through this, and make him understand that he has a life worth living?