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It's just the recent flakiness that has been getting to me. Would it be a good idea to stop communication for a few more days and make her worry a bit?
I was in a similar situation recently. She was flakey, but I was really into her and always found myself sending the first text. Then I did this: I waited for three days and then I sent her a text that was "supposed" to be to my buddy. It went something like this:
ME: "Hey man. Sorry to hear about your leg. Say when, if you still need my help with the boat. Take care."
HER (like, immediately): "Oops. I think you sent this to the wrong person

"
ME: "Oh. Yeah, it was for my friend Dan" (Her name starts with Da as well)
HER: "So, what's with the boat?"
ME: "Nothing. Just helping out my buddy. Anyways, we should get drinks soon."
So, htis tactic allows you to re-initiate texting without sounding needy. Also, you can use the message to "Dan" to demonstrate value. In my case, I tried to appear generous and helpful. If you're more creative than me you can probably take it even further.
Good luck.