Make sure to ask you L about options involving legal separation. In many states you separate all the assets and leave the divorce for later. Then when one of the parties files, the legal separation becomes the terms of the divorce so usually all that is involved is waiting out the mandatory waiting period. Now if you filed for that, he could just turn around and file for divorce, but he could do that any time. Going with a legal separation may protect your financial interests at a time when he is likely feeling guilty and being more generous, but leave open the divorce until you really detach and have time to parse what you want and he has a chance to play out his greener grass theory.
Also, talk to your L about his income. Sounds like perhaps he had a huge jump in his income less than a year ago. If that is the case and depending on length of marriage, etc., it may be beneficial to wait a bit so he has more time at that income before pulling the trigger in case that has an impact on your ability to get alimony (does your state have it, how long a marriage to trigger, does the recent separation affect it).
Do you get health insurance through him? If so that could be another benefit of LS v. D as you likely could keep it through a LS (check the plan) but not through a D.
Lots of stuff to think about here but try to separate the business part of this from the emotional for now. My thoughts are with you.
