He didn't know he was acting silly and cute about him.
He didn't know that he had been infatuated with him since childhood.
He didn't know that he had always liked him because he had learned to smile and be strong just because he would be qualified to stand by his side in the future.
He didn't know that he had been looking at his photos and learned to work hard and do things just because he would be qualified to stand in front of him in the future.
He was warmed by his sunshine.
He is the oxygen that supports him.
You know, when you express your admiration, you already express your admiration.