So sorry. You have gotten good advice from the others. It sucks. No matter who's right, who's wrong, everybody loses and it just sucks. You will live through this and go on to having a good life, maybe even better.
Oh, I am so sorry. That is just awful! Lots of us have had trouble with our other halves wanting a different life. So just know that you are NOT alone. Sometimes we grow apart. It is never just one thing that causing people to separate. There are usually many things that cause the desire to leave one another. You yourself might want to seek some counseling so that you can heal. This is going to be a difficult road ahead of you and you will probably need some support.
so sorry to hear that you are going through such shock! FJ and the others have great advice.... I hope you can find the strength to take some of it. I wish you the best.