Thank you all for the support. I hung out with some friends last night and was able to laugh and smile and put on the happy face even though it was eating me up inside. AnotherStander, you make a lot of great points and I'll do my best to keep them in my mind. I'm constantly playing back the last few months and beating myself up about "why didn't I get it together earlier, why did I continue to push her away?" Stuff like that. It makes things super difficult.
One question, when you say validate her, do you mean agree with her saying she's done and wants to separate and divorce? I'll stop with the posts and just let her see the changes when I get home. I'm learning patience and its a painful process. What a mess I've made.