Hello,
I was married for 17 years and am going through a similar situation as you. It is not finalized yet and he has already posted a video of him and his new girlfriend making out. Impressive huh. I loved him with all of me and I gave all of me. I don't even know who I am without that life. We have only been separated 5 months but I say handle it how you feel necessary. If you want to cry, scream or do nothing then so be it. Get through it anyway you can. There is no right or wrong way. Although some people might say so. They are usually the ones who have never been there. I am still crying and trying to pick up the pieces while he has moved on. It is so sad to me that someone could throw away such a big piece of a life as if it was nothing. I just keep praying and taking it day by day and telling myself that I AM IMPORTANT. We will get there someday and I know there is a reason we are going through this. I wish you the best and know that GOD loves you.