Right now you're letting her be in control, and you need to turn that around so that you're in control. Because if she realizes she's the one holding the cards, she's going to perceive you differently, i.e. a manbaby. And when she starts thinking of you as a manbaby, you're done son.
So either stop calling/texting her and play it off that you've been too busy OR call her out on it in a way that shows her you aren't going to play games and you want things to change (either she needs to step up or you're out).
From my experience, if your gut feeling says it's done, it's done. It was fun while it lasted, but it's reached the end and onto the next.