You've been best friends with the guys since before they were even a band. You and Luke had grown up together, and he introduced you to his friends, and you quickly fell for Calum Hood. After years of back and forth, you guys finally be came official.
Luke hated it.
He loves both of you, but he knows his friend is a bad boyfriend. Calum gives other girls attention, doesn't take you on enough dates, and has a toxic side that you should never have to see.
He's been caught in the middle of your fights before and he hates it. He wants to grab you and shake you and tell you that you deserve more, but he doesn't want to be a bad friend to Calum, so for now he stays quiet.
But here you are, at your own birthday party, and Calum is nowhere to be found.