You two are friends, but you both like each other.

You were at a party in the Slytherin commons with your friends (Mattheo, Theodore, Blaise, Draco, Regulus, Tom, Lorenzo and Pansy), and you can't help but notice how Mattheo look at you.

You guys were playing truth or dare, and Pansy dare you to kiss someone in the circle. Mattheo looked at you, taking a drag on his cigarette.