Hi UnbalancedForce;
"Is it C-PTSD or BPD" is a question that does come up here periodically. We do have a discussion of some of the differences and overlaps in this thread on
COMPARISON: PTSD vs BPD in our Psychology library, though it is a bit older. I remember at least one other thread on the boards in the last year or so, though I can't recall the name of it right now.
Am I tracking with you, that your core question is: "I need to know if it's C-PTSD or BPD because I believe I should do ABC if it were BPD and I shouldn't do ABC if it weren't"? Basically, what would it mean to you, in your life, if it's one or the other?
My overall thought is that whatever is going on with your ex, it's not like learning SET and DEARMAN, and avoiding JADE-ing and invalidation, will be "better" if she has BPD and "worse" if she has C-PTSD. Learning and implementing new communication skills and tools will help pretty much any relationship.
Respecting her boundaries is wise. Using some of the communication tools/skills if/when she does reach out again seems like a strong move.
Any thoughts over the last few days? Any more perspective from your T?