Girl playing hard to get or not interested at all ?

[acmilan]

Hi,
Recently I've met a very beautiful girl on facebook. We chat constantly, but the problem is that I always initiate the conversation first... I don't know, maybe it's because i rarely go online on fb. Additionally, when she's online, and when I send her a message she replies instantly in few seconds??? Also she uses a lot of smiles in each sentence, and signs like this: * :_*... Haha etc.. And few days back, I've send her a pm saying.... Hey girl are you still alive because I've decided not to send her messages for a week., and her response was: I'm a live, but you have apparently dissapeard :-)... I've always been good with girls and I didn't have any problem with communication, but this girl is driving me nuts. My biggest concern is I don't know whether she likes me or not :/??? Because if she keeps messing with my head just out of politeness, I'm just wasting my precious time... What the hell should I do ? Should I ask her whether she likes me directly, because I do not want to be weirdo and talk to her if the interest is not mutual...,I will do appreciate all of your answers and suggestions regarding this issue.

Thanks