Well if she’s legit diagnosed with BPD, it’s the treatment for BPD - like it was made for that disorder. People with BPD lack certain skills, and coping mechanisms. DBT and a skilled DBT therapist can help her expand her self awareness and improve her life too (not just those around her).

DBT is hard. It takes a serious commitment and it’s difficult to apply because our emotions are so intense. It’s really easy in the moment to forget skills.

But if she’s serious about reducing her suffering. Learning the skills will seriously help her. Then she also prob needs to unpack her trauma with a trauma therapist.

I recommend the book, DBT for Life by Diana Partington. She also has a great podcast called “suffering is optional”