She probably bailed because you weren't how she imagined you to be once on the date. Texting her again would be a complete waste of effort and surely destroy any chance you had left of making it work, if any.
Any reasonably attractive girl has at least 20 guys waiting at her beck and call. You are not the only one with two eyes and a penis. Some guys are in the same situation as you with her, others may be getting her attention. Fail to make a great impression or differentiate yourself in a great way, and you get ignored. Discarded, forgotten, deemed boring and not worth the time. She is not waiting around wondering when you'll text back. She got your message, saw it was you (and you texted with something as pointless and directionless as "How's it going?"), and ignored it. Maybe there's an off-chance she actually was really busy and couldn't get back to you. Maybe. But are you really gonna bet on that?
Comeback Kid is absolutely right. I can't really see the full situation since your story was kind of hard to read, but if you had an intense make-out session and then left her hanging, she's gonna be disappointed.