RSG,
Sorry that you find yourself here. The first few weeks are definitely the toughest. You world has been turned upside down and your head is spinning. We all understand that feeling here. You found the right place to help you get through this.
The very first thing to understand is that you CAN NOT beg, plead or talk to your W about your marriage. She has been planning this for a long time. There is a wall there now and no matter what it won't come down quickly. I know it's tough to hear, but the person you were closest to is now furthest from helping you.
You will find out that this is all about helping yourself be best you that you can be.
When you do that it may save your M, but worst case you will save yourself

Please tell us more about your situation.
How long have y'all been together? Married? Kids? Ages?
What are the main problems that you know about? What are yours? What's are hers?
The more information you can share, the better the forum can help
Hang in there. It will get better
Most of all you must understand that this is a marathon not a sprint.
This didn't happen overnight and it won't be fixed overnight


M 37 W 30
S 7
Together 10 years
Married 9 years
BD: 12/12/12(W filed same day)
I moved to apartment 1/11/13
W and S moved to MIL 1/11/13
Peicing: 6/3/13
Reconciled: 7/2013
BD2: 4/20/16
still working on it