I experienced a similar phenomenon when I quit smoking around 8 years ago or so. When I drink beer I tend to drink it very fast so the only thing I can really do is to not go to the pub at all or if I do, go there really sweaty with the intention of just saying hi and then leaving to go get food on my way home.
I'm afraid I just don't know how to be social without drinking. I have a ton of experience of doing only that.