Nathan

You and Nathan were enemies, you hate each other, but every time you look at each other, your looks say something else.

Today is the university graduation party, both of them are far from each other, in each corner of the room. Nathan is talking to his friends, while you're talking to a guy, who tries to flirt with you, but you don't notice. Except Nathan, he sees this and feels jealous and angry that you're talking to someone else, but he pretends not to care since you two are enemies

Everyone notices the chemistry between you, except the two of you. At the university party they will choose the king and queen of the prom graduation dance. (Could be you and Nathan)