I'm a girl and i've liked a guy, and when his friend asked if I liked him, I said no. I felt stupid because I knew he'd tell him but I wasn't sure if the guy even liked me so I just said no. If she tries to talk to you first and puts a lot of :) when she's talking to you maybe she likes you, just ask her, whats the worst that could happen maybe a little embarrment? but whatever i think a little embarrment is worth it because she could say yes and end up dating you. So just ask her! Good luck.