If what she is saying is true, and if she doesn't have another man in the wings, then what she is telling you is important information. Have you neglected her?
There is an article called "Why Women Leave Men" by W. Harley. He says that the #1 reason women leave and file for divorce is neglect: it isn't abuse, or infidelity or finances or addiction issues, it is feeling neglected.
Not sure if it applies to you, WAWs tend to rewrite history to suit their mood, but if it even smells faintly true then stop distancing yourself from her immediately. Pay attention to her. Do a 180 with your behavior and engage with her. And if she is just rewriting history then get ready for divorce.
I'm a man . . . But I can change . . . If I have to . . . I guess . . .