Need an Advice here about a girl?

Have you really indicated your interest to her? If not, why not call her and discuss your mind. then you take it up from her answer. For all you know, she may really be expecting you to say something to her and that may be her way of getting you to speak out. And are you really interested in her? Search yourself too.

Not because she spent a conversation with you once, it means she also likes you. Maybe, during that conversation, she discovered something about you that she doesn't like that much. Or to put it straight, maybe, she felt your intentions and she can't reciprocate it. So she choose to stay away. I think she did the right thing. If she doesn't like you, its good that was honest about it rather than make you feel you have the chance. Don't worry. There are lots of girls out there! Maybe, she's just not meant for you. =)

maybe you got her turn off or theres something you do that turned her off of you, also maybe shes just flirting with you also theres a possiblity on that they she needs something from you and now that she have that then thats it sorry dude dont know you anymore!