Ugh - so sorry! It's rotten that you have to deal with both your marriage breaking down AND your job collapsing.
So - first things first:
You can't control what he does right now - the only thing you have control over is YOU. So it's a good time to work on the new, improved version of yourself. Take stock - what do you need to work on? Are there things you need to improve? Habits you need to change? Is it time for a new hairdo, a weight loss program, time to take up an exciting new hobby? You need to shake up his image of who you are - he's making assumptions about you, prove him wrong!
Stick to the high road - you want him to see you as strong and heroic through this crisis.
You can do all this stuff even if you're not sure you'd want him back - because even if you don't, it still feels good to have them realize what a catch you were and how stupid they were to lose you. And if you do move on, you'll end up being that much better a catch for someone else.
This is an opportunity for change and growth - horrible as it seems - and the more you take advantage of that, the better you will do.
As for the work situation - what are your options? Do you own part of the business? What might you be awarded in a divorce? How easy would it be for you to find employment in another similar business, or start your own? I certainly wouldn't give up the job, no matter how awkward, until you knew you would be taken care of financially.
Do you have children? Do the two of you own any assets, like house, retirement plans, etc.?
