Stace I’m so sorry this is happening. It has to be the worst feeling in the world. I found concentrating on the practical helped. Or was at least a distraction from all that hurt/angry/bewilderment.
You’ve got to try to take the initiative. start thinking how finances could work going forward. Write a budget, bills, cm, benefits. If your ex has left tax docs & bank statements in the house, copy everything & file it away.
And access. If you are going to live apart, what could work for you & suits your children best. Set the expectation now that he will see your boys regularly.
How will you communicate. Choose something that is timed, dated and can be retained. It sounds silly but will help avoid the emotive while trying to maintain good levels of contact for the children.
Reassure your kids. (I’m sure you are anyway) Tell them they are the most important thing in the world. Lots of cuddles and try not to let them see you upset.
And take care of yourself. Try to eat, get as much sleep as possible. Don’r expect too much of yourself. It’s tough. 💐