From my perspective:

If she has to think about it, the answer is already no? Or if its a yes, then she's just weighing her options, and I don't want to be someone's backup, so that's a no?

This is a really nice girl who works a lot so I REALLY want to give her the benefit of the doubt, but what the hell else could it be? Literally just not knowing?

Edit: for anyone who cares, I called it off. Not waiting around for that bs