the best concerts i've been to alone are ones where i accidentally made temporary friends. i know the anxiety defeats this rec a little bit (i usually am in & out silently when i go to shows alone, so this is rare) but i recently went to a show by myself and made a few friends in line and it made the experience so much more enjoyable. sometimes the anxiety stems from feeling like ur standing/staring in a place where u feel totally isolated as if u dont belong there, but learning even the bare minimum about the ppl around u can sometimes eliminate that. talking to strangers is hard all the time but the lucky thing about concerts is that u definitely have at least 1 thing in common :) butt into some conversations. compliment someone's outfit. it gives u someone to vibe with/talk to for a few minutes or hours and then, if u want, u can disappear and never see them again!