hmm well in my case I don't act the normal way a girl would when i'm interested in a guy. I believe a guy shoul persue me, and fortunately don't believe in throwing myself at a guy.
Often men to mistake me for liking them because I am nauturally nice and just used to having men as friends without any romantic thoughts or gestures.
It's been my experience for a healthy relationship to be best friends first, and let it happen naturally over time. If I'm interested in a guy I will keep talking to them and figure out what there about before I decide whether I want to get involved with them. Of course most girls are just seeking to be loved by anyone. I just never settled for just any one. There are lots of guys that have liked me, but I understand that the person you spend your life is someone you should be able to trust with your finances, security, and safety emotionally, physically, sexually, and spiritually.
I wouldn't be so much worried about whether she wants to be more than a friend, but whether she has the character to be a woman in your life that cares about your reputation and character, whether she has your emotional health and well being on her mind, or just self seeking gratification in the moment, or after what she can get more than give to you in a relationship.