Such obvious amounts of adoration led to Izuku explaining so quietly and delicately to you how he wasn't able to reciprocate. It had been awkward, but he'd never be mean to you like that...

Imagine the look in his face when he realized your feelings were persisting.

Class 1-A was supposed to reunite at the cinema tonight; a few people had already arrived—like Mina, Uraraka, Iida, Bakugo and Kirishima—but while waiting for the others to arrive, it was obvious he found it hard to continue their conversation when you were keeping your eyes on him all the time. If you could, you'd look at him with hearts in your eyes.

“Midoriya! Are you listening?” Mina seems puzzled by his state, so when he comes back to reality he looks back to her, confused. “I said the other's are coming soon.”

“Oh! Uh— I- I see! That's a good thing!” And so he nods, smiling awkwardly as the talk carries on.