What is happening and what does it mean? (sorry it is long).?

First, allow me to discuss the situation in my school. Because of the weather, after lunch we sit in the gym until our teachers come and get us. We sit against the walls because some morons were hitting the volleyball net.

Ok let me get started:

After lunch I was one of the first to get to the gym, so I sat down alone and waited. Soon after, a large social group came and sat down in my general area.

The group expanded.

The group expanded.

The group expanded.

Until finally people were sitting right next to me. Then, a girl (who I happen to like) sits with the group right next to me. She says hi and I say hi back and then go back to my own business. Then one of the girl's friends came over. He is taller and stronger (and less intelligent) than me. There was no more room, so he tried to intimidate me by staring. I wasn't intimidated because I had recently gotten my black belt so I knew I could defend myself. After awhile, he finally said "Why won't you move?".

I replied "Let me answer that with another question. Why do you persist in trying to scare me when the only thing you have to get out of it is freshly fractured pride and dignity?" I meant this in the most sarcastic way possible. Anyway, as soon as I was done the girl began laughing like crazy. The other guy left and I got back to my business.

Several minutes later, I see throught the corner of my eye that the girl is looking at me. Not like we just happened to look at eachother, but like a gaze of sorts.

Is she just awed at me telling the other guy off, does she like me, or is it something else entirely.

NOTE: I want to know so I don't jump to assumptions. I am not interested in pursuing this girl, despite me liking her. This is mainly because my best friend also likes this girl (bros before hos, right?).