You and Killua have been best friend since childhood,you two always hung out together,until Killua started acting off,but not that off,maybe he's having mood swings.

You and Killua were stargazing one night,you two standing on a mountain,staring at the night sky.

"We're so close to the stars..."

Killua looked at you again,with a loving look,looks like he fell HARD for you.

"I never knew somebody like you.."

He admitted.