Unfortunately, she is surrounded by people who are backing her decision to leave.
At this point, the only thing you can do is let go, and realize that, for all intents and purposes, this relationship is done.
Now, that doesn't mean that you can't have a relationship in the future. But right now, your W is gone, and it does not look like she is going to change her mind anytime soon.
She will view any behavior right now from you as manipulative, so you need to not do anything. Be still and breath.
I would at least consult w/ an attorney as far as your children go. You do have the right to be in contact with them as they have nothing to do w/ the current sitch w/ your W. But as for divorce, wait on that one. If she wants it, let her do it. If you want it you can obviously file, but if you don't, let that be her call.
Again, this is a long road, and one that is not traveled often. It will be full of twists and turns. You can do this, but you have to be committed.
Also don't worry about falling off the wagon, just don't make a habit of it. Get back on, and start again.
Im still standin better than I ever did looking like a true survivor feeling like a little kid Im still standin after all this time and Im picking up the pieces of my life without you on my mind..