I have felt what you are feeling. The hurt, the anger, the disbelief. And the LYING! But I have to tell you. Even after 7 years and 3 years divorced, my ex STILL lies to the kids and I. He is not proud of who he is or what he has done. So he lies about it. I think he just got used to lying about everything and I think sometimes he even believes himself.
Just remember that you should only do what you want to do. You can get advice from the lawyer but only you can make the decisions. A divorce is only a piece of paper. It won't change the emotions of the situation. But it does free your H up to marry OW. And there's not much chance he will come back to you if you divorce him.
Only you can say when you've had enough. Hang in there.
