Hi!
Back when I had bad social anxiety my Mum "made" me go on holiday with my brother to Tunisia. I didn't want to go at all but went. There were some things I liked but in general I was out of my mind the entire time. I kept functioning but barely. For me it was small things which kept me together like taking a game and watch Donkey Kong game to play, playing backgammon with my bro and even taking a few catalogues from a local electronics store.
I still get it but not as bad. Last week my other brother wanted to go driving to France for a few days. The worst part was the ferry on the way. So many people. I ended up finding the quietest place on the deck and sitting staring at the water like a madman for 90 minutes!