I'm getting a feeling that she's teasing you here, messing with your head and you're beginning to read a lot more into this than there really is. I'm saying this because if she truly was interested in you then she would have at least talked to you but hasn't, so its likely one of your friends has put her up to this especially since she has a bad habit of telling your friends everything you say to her.
The only way to know for sure is to just ignore her and move as girls hate to be ignored. But you'll know the truth soon enough. Good luck