Does this girl like me?

She sounds like she likes you but she isn't really obvious about it because she is shy and is afraid that you don't like her. She probably doesn't want to creep you out. A lot of girls act like they don't like the person that they really do like. If they are shy, they usually just wait until they are positive that the guy likes them until they really start flirting and stuff like that. She also sounds like she is nervous when she is around you and maybe doesn't contribute to your convos in school because she is afraid she will say something stupid in front of you and embarrass herself. It sounds like she likes you though. If you like her, you should definitely show her because you guys are seniors and it's not like you will see each other next year if things don't work out.