Thanks for all your replies everyone.
Was it just a case of waiting to get used to being around people again? It just seems that I'm so awkward and diffident around people at the moment that I wonder how many friends I'll still have this time next year!
I would like to make more friends from AA, and that will slowly happen as I attend more meetings I am sure, but having my whole friendship group from AA may well be nearly as painful for me as having my current drinking friends, simply as a constant reminder of why I met them and of my drinking past.