I think it depends on how she is acting, i mean maybe she really is busy. I am really hard to get a hold of. im like never home, why dont you just try calling her this time, and i dont neccissarily think those rules above apply, i mean i think its cute if a guy i met and gave my number to left me a message, now i mean, one message is okay, but dont over do yourself. Idk. I think you should try calling one more time sure, and if you get a hold of her pay attention to her. Maybe even try seeing her, i know i would lose interest if all i did was talk to some guy on the phone. but idk thats me.