I just don't understand why I can't explain why she left to anyone, even myself. I'm at a loss and my mind wants to solve it but I just can't. I realized this when trying to explain and almost defend her actions, what the heck am I doing?
We all "get it", but people never exposed to someone with BPD simply don't. How could they? Here we all are still trying to wrap our heads around dysfunctional behavior. Additionally most of us had to find closure and validation ourselves, because we were never going to get that either.
I received my validation and closure through my work here and by realizing from all the posts, that many of us came away feeling the same as you - no validation - no closure - no understanding of what actually happened. Little of it ever made sense and why we are often left with this "hole" inside of ourselves initially.
If your 'ex' was BPD, then "what happened" was she is living a life with dysfunctional views and dis-regulated emotions. Her logic makes sense to only her. It is their dysfunctional ways that so twist our thinking and leave us questioning. BPD is a serious mental disorder and that is really the only thing we really need to know. The rest of it is simply irrelevant.
Peace to you