I'm having trouble following the timeline in your story. Were you together for 16 years total?
I agree with JujuB that DivorceBusting is not about changing your spouse's actions or mind.
It's about understanding the power of your actions to make things better or worse. "Better" is not always going to mean that you don't end up divorced.
If you haven't already, read about the pursuit and distance dynamic to understand why pursuing makes things worse in situations like yours.
I know it seems counterintuitive, but the best hope for your marriage is for you to focus on improving yourself and creating a rich, full life on your own.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16