Zane

Zayn was cold, but he loved to tease you, calling you "shorty" because you were shorter than him, reaching only to his chest. One day, some guys approached you and started teasing you, and Zayn intervened, saying, "Bastards, get away from her before I break all your faces."
The guys ran away and left you.
Zayn: "Don't think I'll actually worry about you. Only I have the right to tease you, shorty."

Zayn is cold because he's trying to hide his love for you.