Alcohol can be a tough addiction to combat. The addict can't be helped unless they want to be helped. I'd reject jacquesm's idea that his drinking is somehow dependent upon your behavior. There's something else going on in his life that he is having a tough time dealing with.

I'd recommend getting him some medical help. I'm unfortunately not familiar with the options that exist in India.

I also think a change of scenery can be helpful, but it's not the cure. It may help him get to a place where he's ready to admit that he needs help, however. Sometimes people need to hit their rock bottom, but other times exposure to healthy patterns can help them along just as well.

I wish you all the luck in the world. My father struggles with alcoholism and I know the effect it can have on the entire family.