Should I go to a concert or a Halloween party?

iluvuangel
I've been invited to a big Halloween party, but I also have tickets to a Melanie Martinez concert on the same night. I've been a fan of Melanie for four years, and my original plan was to go to the concert with my friend. However, I now have to bring my cousin, which means my friend will go to the party without me, and I'll miss out on a lot. Missing out really bothers me because this party is a chance for me to meet new people, maybe get together with someone I like and potentially strengthen friendships. What do you think I should do?
Updates
6 mo
If I’m not going to the concert I’m giving the tickets to my cousin for her to bring a friend.

I’ve never been to a concert and I’ve been to a Halloween party before but this one is HUGE and it’s my last year of high school, last chance.
Should I go to a concert or a Halloween party?
4 Opinion