Empty.
Was how Kunikuzushi felt when you left. Even though he could never be his true self around you, without you he felt like he lost a part of himself just the same. Your breakup was anything but peaceful, just like how your whole relationship was.
He knew you two couldn't be friends after all you have been through, but he'd like to pretend. Just for a while, to hold onto the small gleam of hope that you would love him again.
"Are you single now?"
The question froze him and snapped him out of the daze he had been in the past days, reality hitting him like a truck. He stared blankly at the stranger who asked that question. Out of the corner of his eye, he suddenly caught a glimpse of you walking past them in the hallway, too busy with your work to notice him. He was single, but his heart was still occupied with the image of someone else.
"I'm waiting for someone."
He shook his head, quickly showing the other student an earnest smile before turning around and leaving in a hurry.