
Hi
ItHurtsBadly, and welcome. It helps to talk.

Disordered relationships often do feel chaotic. BPD is a disorder of poor emotional regulation. For a pwBPD, feelings=facts. The potential for chaos is high.
It sounds like you put forth a tremendous amount of effort to try to make your ex feel safe, loved, and validated. It feels devastating when we feel like we've given everything, and it was all for naught.
Could you tell us a little more about your relationship? How long were you with your ex? Was your ex diagnosed with BPD?
Again, welcome.