Hell, man, let her call you next time. You already established with her that your interested in her. She probably expects you to call within a certain time period. And if you do just that, that tells her that she's got you figured out. By not doing what she expects you to, like calling for another date within a certain time frame, makes her start to wonder how much of a hold she's got on you. If you start placing doubts into her head like that, she just might start pursuing you, if she really does want to be with you. Sometimes a woman desires more something that she can't have, instead of something she can have easily. At this point you've shown her that your something that she can have easily.
And have you been tripping over yourself to please her whenever your with her? If so, you might be presenting yourself as a "nice guy". And everyone knows what that means. Because if you are, then she sees you as the type of guy that kisses her ass. And ain't no woman out there gonna respect a guy that kisses her ass. And women never have lustful desires for a man they don't respect.
Or go ahead and call her again. What I said in my first paragraph can technically be classified as "head games". Its never worth it if head games get involved. But she may be playing you already, who knows? Good luck with her.