Sokka, furious: you think you get AANG? I've been friends with him for way longer, he's basically my little brother, he was the first person to make me look at life in an optimistic way!

Zuko, equally pissed: oh big deal, he was the FIRST person to ever offer to be my friend, EVER, and he never completely gave up on me no matter how much reason I gave him to, I would do ANYTHING for that kid

Aang, sobbing: I love you guys so much

Sokka: aw, Aang ❤

Zuko: we love you too ❤

Sokka, back to Zuko: anyway swords at dawn

Zuko: I will fucking destroy you

Katara, watching Sokka and Zuko brawl: if these two keep this up there's not going to BE a wedding. Aang, why don't you just decide whose best man you want to be?

Aang, still weeping: HOW am I supposed to CHOOSE

Katara: don't be silly, obviously you should go with Sokka

Toph: uh, what? He should go with Zuko

Katara: swords at dawn

Clearly the solution is Aang should officiate