Look into DBT. It's a type of cognitive behavioral therapy that helps manage BPD. If you're not ready to start therapy, read "Feeling good" and "Feeling good together" which are cognitive behavioral therapy. I have one friend with BPD who has been in a good relationship for years. It is possible.
My mother has BPD so my experience is through the lens of someone who grew up around it but not with it. I think it’s such a wonderful thing that you seem to want connections with others. As I’ve worked to understand BPD, I found a really interesting YouTube channel called Borderline Notes. I’d characterize it as a documentary/research style series of therapy sessions with expert clinicians who specialize in working with BPD. The topic of relationships is addressed deeply and thoughtfully from the patient and therapist perspective and I found it fascinating and complex. The Charlotte series is wonderful if you’re inclined to check it out. I wish you luck on your journey. I understand there are many challenges and hope you find some peace and joy along the way.
Have bipolar. Similar to bpd it can be managed. Dm me if you want to talk. Relationships are hard with any mental health diagnosis if the partner is not well aware or empathetic.
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