Social anxiety and prom

So my prom is May 19th and I've got everything together but my anxiety is starting up about the whole thing. My bf and I both have really bad social anxiety, but I've been to several dances before so I'm not worried about me, more him. We have a system that if one of us gets really bad anxiety then we squeeze the other ones hand; now I usually can find a more quite place to pull my bf aside when it's bad but idk what to do at prom. I care so much about him and I kinda dragged him into going (yes he wanted to go but I brought up the prom subject) so does anyone have any advice as to what I should do to ease his anxiety (and maybe mine) at prom?