I'm starting a new job in a few weeks, and today they emailed to let me know the date of their Christmas get together and asked if I would like to join. It's an event in the office, and then a Christmas meal after work. I'm on a hybrid contract (one day a week in the office) and the office is 1.5 hours from me.
I really don't want to attend the Christmas meal out as I get really anxious and overwhelmed in social situations (I'm autistic). It always takes me a while to settle into new jobs, and this meal will be the first time I see the whole team at once. I'm also coeliac so I have the additional stress of worrying if there'll be anything I can actually eat on the menu, worries about cross-contamination, etc.
Would I BU if I say a white lie and say that I have already got plans for that evening so I unfortunately can't attend?