I agree with the others: The process you are going through now is a form of grief. There is a part of you that knows that this relationship was doomed (and note that we can admit this fact without assigning blame to either party), and there is a part of you that desperately wants to hold onto the good parts. But sometimes the relationships that are full of electricity are the most dangerous ones, because all of those happy chemicals cloud our judgment and make it hard to see things as they are.
I wonder what it would be like to try visualizing this relationship from a very distant vantage. Imagine you are a hawk soaring high above everyone and you saw, down below, two people having a relationship that played out just like this. What prediction would you make about their future? Would you want them to get back together? If so, would it be under these circumstances?
Disentangling yourself from a codependent relationship is bound to hurt—that's the nature of codependency—but like ripping off a bandage, it's a temporary pain that can clear the way for substantial and lasting personal growth. Compare this to staying in a dead-end relationship and repeating the same cycle of fiery passion and heartbreak. You owe it to yourself to cultivate a bit of emotional fortitude.
At the risk of overreaching with speculation, I think it is very likely that in this instance, she was projecting her own codependent tendencies onto you. "I think we are getting codependent" is, in a sense, a coded way of her saying "I don't understand what healthy attachment is and I expect you to figure out for me."
