Welcome aboard. Apparently you were not satisfied with the advice received from the other forum, or maybe didn't agree? I will cut to the chase here and tell you that even though you have found no evidence, she is showing signs of a young woman who wants to announce her single status. She is in a hurry and doing it publicly. So one has to ask....why?
Most women desire to be in a relationship most of their lifetime. You can observe them leaving one R to immediately go to another. They will have OM waiting in the wings while she's getting out of her M.
If she is not involved with another man, then she either wants to free herself up b/c she has her sights on somebody........or she wants to prowl. The single life is glamorize by Holywood, magazines, etc. Most of all, it is glamorized in her own fantasy. So right now, she just wants her freedom to start that lifestyle.
Is it possible to win her back? There are no garantees, but yes, it is possible. It won't be easy and it sure won't be quickly. A lot of men can't go the distance b/c it is a very long and hard road to travel. All you have to do is read the accounts from others here on the board.
First thing is to read the book Divorce Remedy b/c this board uses the principles taught in that book.
You will get more how to information as the posts start coming. Can't give it all at once, but I will tell you not to pursue. Back away and leave her alone. DBing is going to seem very strange to what your emotions are telling you.
Post every day and you will get more replies.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!