Wow that's really difficult. Sorry you had that experience. Do you ever feel like there's things you want to go do, like concerts or restaurants, that you're missing out on?
Not really. Concerts really aren't entertaining, and while I like restaurants, busy ones mean waiting so I don't typically go out of my way to go to them.
It really has to do with the amount of stuff going on all around me. The more happening, the greater my anxiety. Casinos I've been to are a great example of this. They aren't packed to the brim with people, and when they are it's old people. It the amount of different flashing lights and celebration sounds of many different games and all that crap.
But like a bowling league to me is fun, because while there's a lot going on at the same time, and there's a bunch of people, they are ALL bowling and for example the sounds are bowling related.