And...with the caveats that 1: I don't think advice in this context is the best way, because there's no way to get all of the nuances of the situation...a good, close friend is better here (yes, dude, be vulnerable, it's okay), and 2: Overall, I think we try too hard to find reasons to end relationships rather than build them (but as of now, you're not in one with her)
Going back and re-reading it (again, I'm overanalyzing a few sentences, maybe it's fair, maybe not), 2 things are making me wonder about this woman. You mention calming her demons, yet she broke up with you because of some things you were going thru? Is this a woman who wants to lean on you, but you to never have to lean on her?
As well, this "she thinks I'm the one, but isn't sure if she's ready to get back together" thing? Why? Wants to sow her wild oats, not sure what's broken is fixed? Essentially...the question is...so where does that leave you? It's an untenable position for you, really. You're supposed to do what in the mean time?
In the end, though, both of you have to realize that...to steal CWilly's line...We don't choose love because it's easy, we choose love because it's awesome. You will have more issues. Just this morning, 2 grumpy, crying kids waking me up and helping them along so they don't make my wife late for work made me realize that 10 minutes of helping them had prevented me from saying my normal "good morning, I love you" to my wife. And that's just a small thing, there are many bigger things that can happen.
I'll close, though, by reiterating that I think a good male friend is a better source for you, though. None of us on here know you or her well enough to give really good advice. Someone that knows you and her well enough to be a good, objective source of advice is what you need here. I think men today are lacking in that overall...I know I am, and am struggling to find friends that are beyond "hey, how 'bout them Cubs, wanna get a beer?" I had them in college, but I don't now. The biggest reason I don't now is I wasn't able to be vulnerable...the old John Wayne, all I need is me thing. But now that I'm getting away from that, I'm also having trouble finding men who are also willing to be vulnerable. Maybe you don't have that...if not, it's something to work on as well.