<human>: Can you provide a brief rundown of the text in within 3 sentences?

I'm a 22 year old male.

She is my age and currently helping me out with some literature from class. She's the kind of girl that has a ton of guys approach her constantly but she hasn't accepted any of them yet. She spends a lot of her free time with me and my friends. There's a lot of eye contact and interest in our conversations with each other that creates a ton of tension. I try to act serious like "yes I understand this concept" but in my head I'm saying "you are so beautiful". 

Right now I'm acting like I'm not interested, which seems to be working because she hates guys who creep on her etc... I think she likes me for who I am and the fact that I'd stay late with her on assignments/duties which other guys wouldn't do. Any tips on how to impress her or take it to another level? I don't want to let some other guy suddenly take her away from me, I am relatively good looking (not to be narcissistic) and a fast learner, but my biggest fear is some guy learning her interests faster than me.

Thanks guys and girls.
<bot>: Beautiful, smart girl (smarter than me), likes me but only because I'm not admitting that I'm that interested in her like other guys. Need to know how to approach her better than others.