Having been the one doing the drinking, I don’t know if it is right for me to say I sympathize. I don’t know the circumstances that caused him to do it in the first place. All I can say is that it is a bottomless pit for those who get trapped in it, until they decide they want out of it. Some do, many don’t. Though I’m sure it hurts you just can’t beat yourself up over it. It sounds as if you cared for him very much. You tried. You did the best that you could. If he wasn’t ready to give it up then there was nothing you could have done, but I am sure you already know this.