What are the triggers of someone becoming an alcoholic?!
He has a lot of pain , and alcohol helps ease this pain. Been there. Counseling is the best route to understanding and dealing with what's eating him alive. The alcohol is an outward manifestation of what's poisoning his psyche.
One trigger is anything the person doesn't want to handle, and the other is everything else.
The word "need". As in "I need a beer." "I need a drink".