I feel that way too, and I am back to day six (almost seven) again. A friend suggested getting together for a glass of wine today, I let her know I was taking a break from alcohol and trying to be healthy, and we went to Starbucks for tea instead. She said she needed to stop drinking as much as well. We are similar ages, jobs, and both have kids. I ended up finding myself another sober/exercise buddy.
I know it is different with people you don't know well yet, but I know I am guilty of worrying about being the only one not drinking, and truthfully, I don't think anyone else would even care. If you are worried you may want to avoid happy hour type scenarios until you feel ready.