Normally I'd be in the "you need to talk things out, get a sense of where you stand" camp, but I have a bad feeling in this case that all you'd come out of that with is confirmation of in how little regard she actually holds you.
One of life's less pleasant lessons is that sometimes communication does not make things better, and in this case I suspect you might be better off settling for the satisfaction of knowing you acted decisively and the vindication of being the dump-er rather than the dump-ee or some half-assed "oh, it was a mutual decision" resolution.
If you really feel she's taking you for granted this way, get her out of your life. Who knows, it might even make her realize how she's been treating you.
One of life's less pleasant lessons is that sometimes communication does not make things better, and in this case I suspect you might be better off settling for the satisfaction of knowing you acted decisively and the vindication of being the dump-er rather than the dump-ee or some half-assed "oh, it was a mutual decision" resolution.
If you really feel she's taking you for granted this way, get her out of your life. Who knows, it might even make her realize how she's been treating you.