I'd definately go with what lomac said.
Also next time you see her, if she starts saying that its hard for her to text back, and that she will definately text you back next time, turn it around so your back in control.
So tease her a bit about not being able to text back, maybe something about needing to possess a certain amount of intelligence in order to hold a conversation on text, and then say that when she texts you, you will make sure you reply.
Doing this lets her know that you know shes playing a game with the whole going cold on text, and also lets her know your in control, aswell as giving you the advantage of knowing whether theres any interest or not, because if there is she will text you
Good luck, and obviously tailor the teasing to fit with your style and so that it wont come off as a direct insult
Hope it helps
