幸福城堡

I am a student in a school that has classes only on the weekend.
The age of my classmates is from 20 to 47 years old.
My classmate A-boy likes B-girl, and everyone knows A-boy has a girlfriend.
But B-girl just treats him as an ordinary classmate.
He is not her style.
A-boy has some close classmates, and they know he likes her.
When she found out he liked her, she refused him.
But he cares about her still.
One day, he sent a message to her by phone.
He told her that he had some words to he had to tell her and asked her to spare some time for him on weekend.
She refused him immediately by phone, too.
He didn't go to school on the weekend, and his close classmates blamed it on her.
It's none of her business, right?
How could someone like another so easily?
He didn't know her very well, and they just talked several short times.
He likes her just because of her good looks?
I thought that was really superficial.