Maybe being away from you, she realized that she did have feelings for you that she didn't realize when she was constantly around you.

But....if there is something that irritates her, coming back might just bring it up again, but then at least you know what to work on in marriage counseling.

Honestly, when I left my H, I never looked back & I never wanted to go back. The several times that I had left prior to the time when I finally left, I only went back because it was MY house also & I didn't feel I should be the one that had to leave (went to my horse trainers ranch at first, then to my Mom's several times).....but I never went back because I wanted to be with him......so maybe you might want to know why she wants to come back? Just a thought from personal experience. I was financially trapped in the marriage until the last time when I finally just walked out. My mother had died of cancer & I was able to sell her home & leave for good the last time, no longer financially trapped after 33 years in the marriage.