-never say i miss you (less your in a LTR-long term relationship)
-if you got plans and wanna know if shes following up, only text/call once! more than that can make you appear real needy.
-dont call her or text her if she doesnt reply to your previous text. again it can make you appear needy. trust me on this. girls are always busy anyways.
I would go about saving things this way:
you:"hey trouble. what you up too?"
her: "hey. nm. u?
you:"haha nm. you wont believe what happend to me today. lets just say it involved work, vodka, mall and a penguin. haha. anywho. what u doin this week. i might have a few hours to spare:) [here your pretty much making it so you can hangout with her, without asking her. she'll then tell you when you both can]
her: haha i gotta hear this. im free around blah blah though
you: awesome. we'll do lunch/movie/whatev. ill pick you up round (time) wear somethin cute.
her
)it might not work perfectly like this, but hey, this has worked for me in the past. let us know how it goes dude!
-kryptonic