Originally Posted by
Stir
Being an atheist has nothing to do with it. Honestly. Even being a nihilist isn't a problem, here.
It sounds like the guy is suffering from depression (and possibly more, such as mild psychosis. His quote, and the sense of detachment of reality it entails, reminds me of that), and self-medicating with alcohol. It's not uncommon (though the most common drug used for this is nicotine). What this guy needs is professional help.
Do understand that the notion of professional help is daunting for many, and many more will not take kindly to the notion that they need this help. However, such a large amount of alcohol, no matter how well he handles it on the surface, it will poison his liver, give him colon and brain tumors, and destroy his kidneys. There'll be damage to his arteries, to his stomach lining, and he will age more rapidly. His muscle tissue will deteriorate, he'll get Alzheimer's (if he lives long enough), and he'll die. Young.
And that is all assuming he remains stable and mentally... In control. Chances are he won't be able to do that in the future. He may grow irritable, irrational, and can develop all sorts of serious mental illnesses, such as paranoia, schizophrenia and phobias, as a result of his alcohol consumption.
He should know and understand all of this. Now; I wouldn't advocate taking all sorts of meds from the get-go; it's probably best to talk to a psychologist about those issues, and about the possibility of kicking the habit.
And that is another thing: Alcoholicism is a difficult addiction to kick. It'll be hard. But in the end, it will be necessary. It's either that, or he'll die alone and miserable, because your friend will have left him before the end. She'll have to, at some point, to save herself.