I like this girl but I keep on getting nervous around her..? [Long Story]?

I've been liking this girl for about a month or two, and she seems to be like a good person at heart. I'd talk to her sometimes, but then most of the times, I'd stay quiet and look anywhere else but her. Eh, it sucks.. I really want to talk to her, but I'm afraid. I don't know what I'm afraid or nervous about. Today, during cl, I was constantly squirming in my seat, and blushed I guess because I felt the heat on my cheeks. Also, when the teacher asked if anyone knew the answer to the question she asked, everyone in the cl looked at me and a couple of people even called my name and encouraged me to answer because I guess I'm the know-it-all-girl... Let's call her M. M saw what everyone was doing; pointing at me all of the time because everyone thought that I always had the answer, and she told them to stop pointing at me all the time to answer. It was...interesting. Um, and last night, I was texting her from ten o'clock to about half past midnight, getting to know her a bit better. After about two hours, I realized that I was keeping her up and she was falling asleep and was waking up to my text messages, and I bid her good night because I wanted her to get some rest. I don't know if this means that she might be wanting to get to know me too. We talked about our feelings, and the how we viewed each other. Haha, she said that when she looks into my eyes, she sees a girl wanting everyone to treat her the same as everyone else because everyone thinks she's the teacher's pet, and the perfect girl. I didn't pay attention to the perfect girl part until I reread our conversation a bit later. Ah, I don't know what to think of it. I think I'm jumping to conclusions. I don't know.. And after she 'defended' me from the people who were making me feel compelled to answer, I looked back and looked into her eyes, only to see that 'something'. I don't know what that 'something' represents. And for the rest of cl, I secretively stole glances at her.. Ah, yeah, I don't know how to talk to her. I mean, I do, but I get sooo nervous, and try to be careful of the words that escapes my lips. Bleh. I don't like this at all...but it's so pleasureable(sp?) all the same. What do I do?