Yes, across the internet at least, that sounds incredibly vague. It could give her the impression that perhaps she could help you find your way back to her, even if you can't do it yourself. You seem quite articulate--I'm sure you'll hit upon an approach that's gentle without being misleading. Don't leave her any avenues to pursue this thing farther by using imprecise language.
Also, for what it's worth, I don't think going back on a decision that went wrong is wimpy at all.