Glad you are doing well, and that you WANT sobriety. That is huge. You don't see it as a burden, but a lifestyle you crave.
If you go way back w/these guys, can you simply tell them the truth?? I have found that so many isolate their true feelings and actions in dealing with recovery. It may just be that there is someone else who does not/cannot drink.
You can also always use the old standby, I am on medicine that I cannot drink with.
Good luck to you. Stay safe!