Sorry to hear about your sitch. I'm certainly no expert but it seems to me your H is confused and scared about what he wants. You both have seemingly put a lot of time and effort, both into your marriage and your business. Maybe he's worried that he'll be left with nothing.
Like all things, all you have is time. You should have one long, frank talk before signing the separation agreement but even if you do, that's not necessarily the end of things, merely the next step.
