I know from my own experience with alcoholism, and present recovery of 10 year, those first few months...even first year were tough. And I don't mean by wanting to drink...but by learning to deal with my feelings and emotions. I feel recovery is a process...not an event.
Your friend may still be dealing with a lot of guilt and shame from the choices he made. Now that he doesn't have alcohol in his system he's starting to feel. And that's new to an alcoholic
I suggest you give your friend some time and hopefully he'll "come around." Given time I bet you'll notice a little growth in his willingness to open up to you and also begin to feel more comfortable around people.
recoveredandfun