I have read hundreds of stories of intimate relationships with pwBPD and have yet to read a single one where the couple thrived and lived happily ever after. Does it ever end well in an intimate relationship with a pwBPD?
I had this same question when I met my therapist for the first time this week. Her opinion may be of the professional variety but as she said herself, it's still an opinion.
In over forty years of practice she said she's never seen it work out without significant concessions by the non partner that included years of therapy for the non to learn the skills to stay in the relationship, as well as acceptance that relapsing, hurtful behavior would be a part of life.
Further, she told me she no longer treats borderlines; apparently the ones she truly could help with DBT wore her out, and the treatment resistant ones... .
The thing that really stuck with me was her statement that remission is not recovery, and though she'd seen the symptoms of BPD subside after YEARS (her emphasis) of therapy, "there's still significant impairment just with everyday functioning."
"I know you're heartbroken but you can have the prom queen without the drama."
Good luck man. I hope you find happiness, whatever that looks like to you. I know I would have loved to save our relationship; hope you can and do if that's your wish.