it means you must go with the flow, court her and have sex. then think about wanting her in a relationship later.
you gotta take a definite stance and be agressive.
as 4>> said, "Until you take this bull by the horns, you're just going to keep getting played like a fiddle."
it helps knowing what she wants from a man. (she obviously doesn't want a serious relationship) ask her. then feed her what she said, repeat that to her as if they were your own words, and pointing out you have that what she wants.
Have sex with her then let her be, forget about her. She'll most surely come back receptive towards you.