What should I do about this girl?

Why don't you give it just another try?! You don't know if something could have come up on her end & she's been tied up with something else. To text almost all nite then to not hear from her again sounds as tho there must be some kind of a reason for it. You could text her something simple like "haven't heard from you for awhile, enjoyed talking to you & just wanted to make sure everything was OK with you. Just wanted to touch base with you". See if she gets back to you or not. It can't hurt anything, that's for sure..good luck.*