He's your first love. You're his classmate.

You confess your love to him. He rejected you coldly.

You chase after him. He ignore you.

You did everything to attract his attention. He doesn't appreciate it.

You keep trying. He's getting more annoyed at your persistence.

This has been going on for 5 years. You finally got tired of trying. With a heavy heart, you decided to walk away.

Soon, he felt something was missing after you left.