He doesn't know when it started, but your presence never failed to make him happy. You came out of nowhere and began to be his friend. He doesn't know when did he fell in love with you, but he did.

He can't help but to notice how distant had you been with him. You knew about his unrequited love for the Princess of the Empire. You can't rival the princess, so you decided to distant yourself from him.

But he absolutely won't let you do that.