Why does she act this way?

I'm doing almost the exact same thing to a guy right now! {like me} it might be because she doesn't know how you guys feel about each other yet, and is a little confused. She may also feel nervous or shy around you (when she wants to get off the phone) or just isn't comfortable with you yet. Sometimes I feel like getting off the phone because we can't just talk like friends, and he isn't naturally talkative anyway. She might not call you back {or start the communication} at all with you because she wants to see how much work you're willing to do-like. if he really wants me, then he knows where to reach me.
I would try to get things going on more of a friend basis for the moment. If that can be established, then communication should become a breeze. =)
Good luck.

Your right she should probably help you out a little with communication thing, but some times girls don't want to sound to needy so they don't call. From what it sound like, sorry, but I really don't think she's that into you. She just doesn't want to say no or hurt your feelings maybe she's not good at turning down guys. If she said yes to the movie then never called you about when or where then she probably would rather it stay at a friendship level for now. I would probably back off a little and see what happens if she really likes you she will contact you to find out info for the movie.

ooo, I'll take this one brotha. this chick is trouble, stay away. She "likes" you but only as a friend, nothing more. I hate girls like these, and they always give you false hope. However, continuing to initiate conversations with her and making yourself look like a needy desperate son of a bitch is only going to make things worse and is an obvious mistake.

I suspect you're coming off as needy/insecure, which may be why she's treating you like a girlfriend. Albeit she isn't showing you much respect with tells me she's not exactly thrilled about having you in her life. Basically you pass the time when she's got nothing better to do and probably offer up validation for her ego when she's down, but as soon as something more interesting comes along she'll cut you off and do whatever.

You basically need to stand up for yourself and stop getting walked on. If she's a friend, then she should show some respect. If not, then why are you wasting so much time with someone you have no chance of seeing romantically.

Either way it's not a good relationship for you to have.