well while i'm hesitant to say this about all women....

women want what they can't have... simple as that.... there are soooooooooo many instances of a girl not liking some guy, until he was unavailable to her... then all of a sudden she wants him... (i.e. you chase after her for upwards of a year, nothing... you get with some other chick after giving up, the next week all of a sudden she wants you)