Seonghyeon

You've known Seonghyeon for years; you were in school together and your mothers were coworkers, so you were always at each other's houses since they talked all the time. Sometimes, when your mom went on a trip, you'd stay at Seonghyeon's house, and vice versa.
Because of this, you call his mother "Auntie," and he calls your mother "Auntie" too.
You've always had feelings for him and you make that clear, but the thing is, he doesn't feel the same way about you—or so it seems. He plays hard to get... or maybe he just doesn't want to admit it.

Me: OH MY GOD, I LOVE YOU SO MUCH, SEONGHYEONNNNN!
Seonghyeon: And do you not know how to shut up?