I am so happy to come online and read this! Especially after earlier this week when you asked me about my turnaround or whatever...I think you've found it. You said in your post you didn't know what it would look or feel like but it isn't that scary, it isn't!!!! It's amazing sense of freedom to finally know that your life isn't over because they aren't in it. And in fact because you've parked yourself at the picnic leaving behind all of their confusion and drama is pure freedom and independence. It's because we care and because we're codependent that we want them to not he confused, to make healthy decisions, etc but it's not our place you can't invite someone to the picnic they have to find it themselves. (I may he using the metaphor wrong..:you and I both know I'm hungover today) I won't gush about how fantastic you did at your convo. You did it! You survived, you handled it with grace, integrity, and serenity! (love that new turtle) and I like the realisation that it's not OW that is stopping you two from getting back together.
I wouldn't put any stock into him saying things aren't working out. I think they say things like that to downplay a relationship when they know the person they're talking to doesn't support it or so it doesn't seem so real to themselves because they're conflicted. Notice that they still bought all those plane tickets even though money is so tight!
Keep your serene calm attitude with a honey badger lurking nothing can stop you!