Harry Potter Fanfic

"You know, it's quite rude of you to not reply. You're ruining my day," I frowned.
He sighed, "Look, you are ruining my time on this train. If you could please be quiet, I would be very happy."
"You know what, my day is completely burned away because of your attitude."
The boy sighs in frustration and turns away, staring at the window.
Occasionally, he would glance at me with a hint of evil and hatred in his eyes.

What do you do?