You really need to get a lawyer, pronto. The ball is already rolling and your h has already been lulling you with promises not to file for D. You have absolutely no reason to trust him. At all! He's way further along in the process than you and you don't want to be caught flat-footed this time.
I know what I'm talking about because I live in WA as well, and I know that you should not be rushed into anything. My h tried to get a quick D and I contested it. You should too with the assets you have. Once your h files for D, contest it. That will give you at least another year, possibly 18 months because you can't get a court date any sooner than that.
DO NOT LET HIM BULLY YOU OR WOO YOU INTO ANYTHING!!!
He will most certainly have to divide the assets fairly and will most likely have to pay some amount of spousal support. Mine did during the time we were separated and he has to pay my COBRA for a couple years since we D'd. I could have gotten more if we had gone to trial. Oh, and he also had to pay some of my atty fees.
Please, again, don't let him roll over you on this one. Your being nice and cooperative with him at this point won't help you at all. They only take advantage of your love for them to get what they want.
Instead, let him think you're playing along and when he files, contest it. Repeat after me: contest it. Because the day he files, the clock starts ticking and if you don't contest, your D will be final in three months.
And DON"T SIGN ANYTHING OR ACCEPT ANY LEGAL PAPERS WHAT-SO-EVER FROM HIM!! He will try to pull this crap under the guise of "saving you both money". Don't fall for this either. Have your L deal with his L. I'm serious.