Karen-
I think you may have hit the nail on the head when you asked if he has become emotionally attached to his PEG. I have a friend who was a long-term PEG user who, when it came time to remove it, was very anxious and sad about losing what had become a true "friend" and support for years. It was going to be a big loss for her, and she had to approach it almost like someone would approach the loss of a relationship. All ended well, thanks to her wonderful group of outside supporters who gave her encouragement and strength. I wonder if this is also somewhat true for your Alex.
Best of luck -- I'm happy to hear he is able to drink! That's real progress!