You and Reith are best friends since birth and you grew up close together

One day you were hanging out at his house and your phone suddenly rang

"It's my ex.." you said, annoyed

"Put it on speaker!!" He said excitedly

Ex: "who are you with?" Your ex sounded demanding

"My boyfriend." you replied normally

Reith then looked at you in shock and his jaw dropped, but he quickly smirked