
glad you decided to reach out!
it is a tireless task, loving someone with BPD traits. a lot of the "dos and donts" are really not intuitive. i learned those things years after the fact. im not sure they would have saved my relationship (and i mention that because far beyond BPD, we were very different in important ways, disagreed on fundamental things; we, personally werent meant to be), but they would have improved things drastically, and i would have created a far healthier situation, if only for myself.
the good news is youve found a support system, which experts will tell you is vital, and a place where you can share and explore all of these things with people that get it and have lived it. things can get better.
have you had a chance to read this; its a good place to start:
https://bpdfamily.com/content/what-does-it-take-be-relationship