Hi
Twice divorced,
Welcome to the family! I am sorry to hear you are having such a hard time with your partner. For years I knew something seemed "off" with my partner but I could never pin it down. I am still not entirely clear, but finding this site helped to feel more supported and be more at peace with things. I hope by engaging with the community here by posting, sharing and supporting each other you can have more peace as well.
Does she seem to have the
traits of BPD in addition to all else you've mentioned here? It can definitely be exhausting, but you may find that some of the communication tools here can help you improve the interactions, or at least not make things worse! It is not easy, but I hope you are able to feel more equipped for these challenges.
Have you read about
being an emotional caregiver?
https://bpdfamily.com/message_board/index.php?topic=173897.0 This and many other things here may help you gain more perspective. I know it has helped me clear up a lot of confusion and give me a lot of hope - at least on most days.
wishing you the best, pearlsw.