Hi and Welcome,
I think many people face a similar situation when they feel pressured into drinking. Personally, I get a bit of an attitude about that. I don't want to ever apologize for not drinking and I don't feel like I owe anyone an explanation as to why I'm drinking coke and not alcohol. It's a personal choice and I try to keep it personal. I also found that honesty was a huge issue for me in recovery. I tried saying 'I'm on antibiotics' once, and I felt awful afterwards. And, isn't it the case, that one lie leads to another.
I wish you well and I'm so glad you're posting!