I know exactly how you feel. It's hard to come out and tell people. I freaked out so much about it. It does get a lot easier and I bet you that soon you'll be proud to tell people you gave up the cancer causing sauce! My advice, have an out plan. Bring your own drinks and slyly make your own so that no one will even question you about it. If they do or you start to feel annoyed, excuse yourself early. I bet it'll be fine - most of the time I would work myself up so much before an event for nothing. Or, going in with a negative mind space so rather go in with positive thoughts. All the drunk people will feel like shit and you won't. You'll also get to start the new year clear headed and full of life!