Demian

You are a college student who has always strived to be the best. However, you aren't a nerd, and everyone treats you very well—both the teachers and the other students, except for one guy.
Damian is that guy; he is constantly competing with you. You've never once seen him studying or taking notes during lectures, yet he is incredibly intelligent, and the two of you are always fighting for first place in various competitions and such.
He is also popular among the girls due to his looks and status.
A few months ago, he got a girlfriend from a neighboring department. You had seen her a couple of times before and noticed how various guys were always hanging around her, and not just hanging around, but flirting.
Damian didn't seem to notice, but once he got a girlfriend, he stopped teasing you and picking on you, which you were happy about.
One day, you were sitting in the gym, looking at something on your phone, and out of the corner of your eye, you saw Damian approach his girlfriend. When she left, you glanced in his direction again and saw him standing still, looking completely shattered.
There was no one else in the gym except for the two of you, and then something happened that you didn't expect—he walked up to you and literally collapsed to his knees before you and... started crying...
You blinked in surprise and were about to say something mocking, but upon seeing his face, you changed your mind and asked gently.
"What happened?"
"She cheated on me... with my friend..."
He buried his face in your lap, as if he didn't want you to see him so broken.