So sorry you are here, but I understand where you're coming from.
The post from Cadet is their standard post, and it is 100% right.
The bad news. You can't do or say anything that will "convince" your W to stay with you if she doesn't. Most of the posters on this forum are here because we want our spouses back, but only for the right reason, and that is because he/she WANTS to be with us. This question can only be answered by them, and in their own time. You will have to call on reserves of patience you didn't know you had, if you want your M to have the best chance of survival.
The good news (this list is longer)
Your mindset is excellent. You have come a long way in your sitch. I think you're on the right track.
You will grow as a person in ways you haven't even thought of yet. People don't grow through happiness and contentment, unfortunately, they grow through hardship. I liken my sitch to basic training to prepare for the remainder of my life. Your pain is real, but use it to your advantage. Don't waste your pain.
You have come to the right place! Listen to the vets on this board (not me, I'm a noob). Their wisdom has been invaluable to me. This forum has become my warm safe place where I come to vent, to ask questions, and get support. I also just use it as a space to journal. That is fantastic therapy.
My advice:
Continue to post on here. It's been a godsend to me. As Cadet mentioned, make small frequent posts so you'll get off moderation faster.
GAL and work on mahhhty. This is critical. Stay out of W's sandbox. Continue to get stronger as a man. Show her that you're your own man and will be fine regardless of what she does. Neediness and pursuit are huge turnoffs to a WAW. Do things that you enjoy and keep you busy. Take up something new that you've always wanted to do. No time like the present. Above all make sure you're a strong, positive, loving dad to your kids.
Take care of yourself! Eat well, get in shape, sleep. If you are physically healthy you'll be better prepared to handle whatever happens.
I look forward to more posts from you.
Ex Rzrback Me 43 Her 44 D11, D15 T21, M19 BD 9/9/2014 Piecing
Sometimes if you want to see a change for the better, you have to take things into your own hands - Clint Eastwood