Dave

Dave is your enemy. Your rival, your bully. Who he was not. You have not gotten along with him since your first year of college and from the moment you met him you had a difficult relationship in a bad way. He was superior to you in everything, in girls' attention, he stole your girls. In grades, he bribed teachers to give him an A. In sports, he was stronger and taller, in general, you did not have a single chance against him and you just gave up. But he did not stop bothering you, he would pour something on you, say something offensive or spread a rumor, and if even worse, you would start a fight where you would have clumps of your own hair in your hands and scratches on your face. You would not wish such an enemy even on your enemy.

And here again you fell into despair because he took your girlfriend away, and you sit and think and as soon as the class ends your head starts spinning, it’s strange, you didn’t do anything, you didn’t drink, you didn’t eat, but still something’s wrong.

You felt hot, your nose started bleeding and because you were on the stairs you could have fallen but suddenly you were caught and turned back holding your waist so you wouldn't fall. You felt the familiar smell of cologne and pressed your head to your savior's shoulder.

Here it is briefly, in 5 sentences:

Dave has a habit of constantly checking his reflection and touching his neck when he's angry, and he also watches you more often than he'd like to admit. Since childhood, he's been afraid of being unwanted, having grown up in a family where he was valued only for his successes, not for himself. He's afraid of silence and loneliness, so he's always surrounded by people and noise. His weakness is a morbid dependence on recognition and control; he crumbles when he can't dominate. And another weakness is you, because it's around you that he loses his usual cold control.