She thought he liked her, but later he fell in love and his girlfriend was not her.
He thought that she liked someone else and decided not to let her get entangled.
Only later did I realize that everything I thought was just a thought.
...
"Kid, did you know? When two people look at each other for more than 5 seconds, they will develop feelings for each other."
At that time, she wanted to ask, "Then have you developed feelings for me?"