Children are remarkable creatures. They often see and sense issues before their parents even do! Quite likely, their behavior is reflecting what they have seen between you and your hub. I know that is what happened with my children.

Please consider counseling for yourself, and in time, joint counseling for you and your hub. Don't try to make a decision now or imagine whether or not you will want to remain with him if he changes. We can only take it one day at a time and watch to see if changes in ourselves or others might actually bring us back together.

But if you can't stop worrying about whether you can manage - then start working on a plan for how you will manage. Write down where you will live, how you will pay the bills, who can watch your children when you go to work, who can be part of your support system, etc.