Hmm. I wouldn't say that If I were you. Maybe she's playing hard to get, or maybe something else is happening with this girl. Text her, don't worry, be confident, if she doesn't answer you already did your part, and you can move on to another target.
For the text:
Open with something funny! There are lots of openers in the forums you can use, but never say: "Hey let's go out again..." NEVER.
Example opener:
"How's my favorite little brat doing?

" You come across playful with the girl, and also get a laugh from her. You can continue the conversation to one point and leave the girl in suspense. At one point of the conversation you can say this: "Your __________ is the 2nd most attractive thing you have." When you say this, almost all women wonder which thing you think it's the first one. And they ask it, and you can tell her you'll tell her, at the end of a movie on saturday, or while eating ice cream friday afternoon, whatever you like. Hope this helps!