We had no kids, just like you. So, it was easier for me to move on and I relocated to a new town and got a new job.
Unlike me, h is saddled with two teenage step-daughters and I can't imagine his "happiness" will be everlasting.
And yes, your h will lie...and lie...and lie...so don't believe a single word that comes out of his mouth.
Hang in there, kiddo. You can do this.
Also, don't feel one bit bad about seeing an atty. You are doing the right thing by protecting yourself. No one said you have to get a D. It may not go that far.
For another sitch that is similar, search for gForce. They didn't have children together either and he was very willing to move on and his w knew he meant it. it scared the crap out of her and she came back. Very inspiring reading!
However, keep in mind that almost everyone here will get D'd. I really wish it weren't so, but it is the absolute truth. I would love for someone, anyone, to prove me wrong, but that won't happen.
You may not salvage your M, but you can certainly retain you dignity. And that is a lot.