I need advice about if I should ask one of the guys I like to the May Dance or if I should ask my little cousin or just go with my friends.

There’s a couple guys i like and one of them goes to my school and one of them doesn’t the one that doesn’t has been one of my best friends since last year and the other one i just met at the begining of the school year and i don’t know who i should pick or if I should just go to the dance with my little cousin (5th grader) or just go to the dance with my friends like I’ve been doing for about the whole school year. (the dance is the most formal dance of the year 4 Knox Jr. High kids) Please help me.!.!.!.!