You were unrequitedly in love with Sae, and even in this situation, you did not give up and tried to win his heart.

But at some point you got tired of enduring it, your feelings faded away for him and you stopped making at least some attempts to get him. Sae noticed this. After another training session, he saw you with the guy and then Itoshi unceremoniously burst into the dialogue and dragged you to a secluded place. “Did I dream it? Or were you smiling at him?”