???Interpretation of this girl's behavior. :/

[hidenseek]

So recently I met a girl. Once in a while I recognized that she is looking at me. But when I turned my head to her she looked away (with a little smile on her face). Newly I recognized her bestgirlfriend look at me in the same way as well (as if both have talked about me - but of course I don't know for sure). Well, I started emailing this girl (the girl not her friend). After she emailed me back I wrote her again. But then she stopped suddenly writing me back, after I asked her, how long she's gonna to stay there (a simple and harmless question I think). (<-we both are abroad in different countries now)

What I have to mention is, that she has shown this ambivalent bahavior to me a lot of times. Sometimes she acts touchy, then she acts nicely. But, as far as I've noticed, she doesn't display this bahavior to her friends/ acquaintances.

Furthermore she sometimes acts intentionally repellent. A few times she doesn't greet me. Yeah! She just pass me without deigning to look at me. But when I ask her a favor she is willingly to do it. Whats that for a person?!? C'mon women reveal us your secret!

What do you think what kind of girl is? Why she is acting like this?

Thanks in advance