Tarheel, your situation is substantially different from a wayward wife or walkaway wife.
+ You don't get her if you expected her to be happy you changed your mind. You pulled the plug because you felt you'd never change your mind, then you changed your mind. She said she doesn't trust this quick change. Her skepticism seems reasonable and should ba addressed.
+ She found reasons to stay with you despite the incompatibility. You thought it was easier to pull the plug. Both of these erode her trust in you being one of us guys who stand by their partner through thick and thin (obviously, minus excessive situations like child abuse, cheating, etc.)
+ She worked through most of missing you, so absence isn't as likely to make her heart grow fonder.
+ If she's desirable she's probably hanging with those of us with too many fun date options, not those lamenting how hard online dating is. A pretty, fun, sexy, loyal, kind woman who wants to settle down ticks quite a few boxes.. if that's how you'd describe your ex-lady!
+ She's invited you to keep talking. The door is open.
This seems like a situation where she may be open to being won by you. Prove your change and affection can be consistent and you're willing to fight for her. Playing it cool is better than begging or being friends, but I'd bring your A game and flirt. Think of how you used to flirt with her, what jokes or compliments you used, what deeper truths you know.
You only regret the shots you don't take. Best of luck to you!