Some confusion on what she's thinking?

Trying to guess what a girl is thinking, is like trying to bottle air. It's possible, but you never actually know when you've succeeded and can stop guessing. Personally, I don't think she's just being friendly because her best friend likes you. I know if my best friend liked a guy I wouldn't act any different towards him. That leaves like and dislike (really it's just like vs. Like as a friend but same thing) and honestly there is only one way to find out. Just ask her to grad or on a date or something. And that also solves the problem of her friend who likes you, because then you have a girlfriend, and she can't nag you or anything because she will have to pretend that she never liked you at all if you r dating her best friend. (in order to be a supportive friend, the girl who likes you will have to basically "unlike" you, so that she doesn't disappoint her best friend, or your future girlfriend or whatever you want to call it.) hope that helps :) good luck . Oh and if you ask the girl you like out, make sure you are subtle. Ask her when you are already having a conversation,(in a break between talking) so that she can process her thoughts quicker.