Sorry your divorce is going to happen. Sometimes, despite our best efforts - we have no choice. Once their minds are made up - we could DB till the cows come home but they won't back down. Usually if there is another person involved - they have even more resolve.
But good for you for working on yourself to become the best YOU you can be. How is your R with your kids? Despite how hard this is on us - we can separate ourselves from our exes eventually but the kids can't. I hope they're doing ok.
What is on your Bucket List for the future? You will find, once it is all said and done that the Divorce is actually quite freeing - once you start to get past all the emotional stuff. And that DOES take time.
At any rate - most of us here have already been through it. And lived to tell about it. We will be here for you.