Honestly, do you really need to know? If you want this over with why don't you file for divorce then it will be over with quickly. He has made his decision to leave the marriage and you really don't have any choice in the matter. I know that sounds cruel but that's the way this works. And it is in your best interest to get this over with quickly. I ended up spending $40K on my divorce...

I know there is a 6 month and a 2 year rule here in IL but the 6 month separation rule is only if you both agree to waive the 2 year rule.

If you file for divorce and put your grounds in it, then he will be forced to reply and it will include his grounds. You may get your answer that way.