Girls are liars.
Look at it this way, would she turn down a guy that she was attracted to? No, because he may be "the one." Screw that bullshit. It doesn't matter who you are, if you have the attraction, she will turn you into "the one."
Treat her as any other girl. Take her out on dates. Kiss her just like anyone else. If she becomes attracted to you, you'll become whatever she wants you to become. In her eyes anyways. You'll still be the ****y funny guy that she dated, she won't be able to understand her attraction to you and that only increases her interest further bringing you closer to "the one."
One of the reasons girls do stuff like this is so that people don't call them sluts or say they date around. It's just like with girls and sex. Girls enjoy sex just as much as men, if not more. But they will hold back in fear of social and public humiliation.