Bakugou has known that you've liked him since your first year at U.A., but he simply ignores that him know that, in fact, you weren't the only person at the academy who liked him "romantically". He might think that you only felt that way because he had a great individuality and, like other people who say they felt something about him, also because of his appearance and etc.

"Tsk..." Bakugo clicks his tongue on the roof of his mouth. He was sitting at his desk as he writes the class notes.