Harry Potter Fanfic

I walked over to the blond boy's compartment and opened the door.
"Do you mind if i sit here?" I asked him. His eyes narrowed in shock. He looked outraged.
"You!? Actually, i do mind, so if you would be so kind as to leave now, that would be grand,"
Really? Well then.
I sat down. He glared at me.
"What? Is there some law against me sitting here?"I replied sarcasticly. I hoped that there wasn't, because i really had no clue if there was or wasn't.
He gave me one last glare, then started to stare out the window.
He was such a rich boy. I laughed.
He glared at me even more.
What should i do?