Congratulations! You are doing one of the most difficult things a mom has to do. You handled it with complete integrity I"m so proud of you.
And yes, we have to set our boundaries. If they want divorce, they have to act on it.
I have to do this as well. Even though my H chose to move out, I need to set a deadline for him to get his things out of the house and I am talking to a lawyer about fighting for my rights. You are inspiring me.
You will be happier in the end, knowing you aren't carrying the marriage alone. I have become happy knowing this. You deserve to be with someone who works as hard as you to keep the marriage growing.