((((((Barbara)))))))) I'm so sorry you are experiencing this pain. We all understand exactly the hurt you are experiencing.
First of all if you haven't read Divorce Remedy, do so soon. Right now there will be no talking any "sense" into him, so don't even try. Don't beg or plead for him to come home. If you have already done this (lots of us did) then just stop. He is sure he has found his soul mate. You will have to let time take care of things.
Do things for yourself, make yourself stong and attractive. Try to be calm and patient. I believe in prayer, it has gotten me through some very rough times. Also it may not hurt to look into a low dose of AD's. I did, and they calmed me down tremendously.
Get ready for the bumpiest, hardest, and longest ride of your life. It's not going to be easy. Come here to vent and read. You will find lots of support here. They sure got me through some rough patches.
Reading other people's threads help too, you will realize that you aren't alone and hopefully find advice and some ideas that you never thought of.
Hang in there, you are among friends.
Life's challenges are not supposed to paralyze you, they're supposed to help you discover who you are. -- Bernice Johnson Reagon