Elementia, I could have written all of that myself. The similarities to my own experience are striking! I had had enough, I was worn paper-thin. I was sick of the 24/7 on-call to crazy it brought.
Maybe in his mind he wanted the best of both world's. To keep me hanging for a time he needs a fix of me when he isn't living his new old life.
This was/is what my ex seems to want. I blocked him, changed my number etc etc, it was a complete joy to know he couldn't get to me with another raging 3page ranting email, or another 'having so much fun without you' text. I stopped needing to check my phone ever 5 mins, or jumping when I received an email beep.
It was like having a mental break. I put up a saying in every room "
Life's too awesome to waste your time thinking about someone do doesn't treat you right". Then I got busy doing anything and everything to break my habit of instant contact, as previously were permanently in contact.
Eventually he manages to find a way to ignore my boundaries, but the important thing is it gave me time to heal and to get strong again. Fact is, I don't need a friend like him. Friendship is about truth, respect, appreciation and support. He wants me to be part of his support crew, or worse, part of another triangle.
If you can get out of contact and stay out of contact, chances are you will heal all the faster. Take care and let us know how you are doing