One of the hardest things to hear and deal with was her confession numerous times after the BU that she had not loved me for over a year :'(
Looking back at her behaviours this seems to fit but I find it extremely painful and feel so naive for being duped esp as she admitted early on in our r/s she did and felt the same toward her ex
Their emotional dysregulation leads them to love bomb - and then to devalue and detach. Hot, then cold. It's part of the disorder. DON'T feel naive - you weren't "duped." This is the truth: you couldn't
imagine that her emotional landscape existed because it's so very different from your own. That's not your fault.
On some level, I think pwBPD often recognize that their emotional landscape is not like everyone else's. How in the world do you go from being completely in love to feeling nothing? Sometimes I think they hang onto r/s's because they recognize this - at least I think my ex did. She wanted to be able to show the herself (and her family) that she was capable of a successful relationship - even as she had sex with other people.
That kind of behavior is not even on my radar to
imagine. Don't feel bad that it wasn't on yours.