Hey Theresa,
I can imagine how you might've felt. Being the odd one out is the story of my life. I think this is something that is going to be difficult for anyone in early sobriety, but I think the problem you're having relating to your family isn't because you're drinking, but because you're in a psychologically vulnerable place. No one *needs* alcohol to be social or have a good time. I assure that in time you'll be more comfortable in your skin and it'll be easier to participate in things like this.
I'm sorry it wasn't a great holiday this year, but they wont always be so hard. And once you get cozy in sobriety it'll have been worth the wait, promise.