Not too long ago I thought I had BPD too. No offense to anyone who has been diagnosed, but my counselor was able to squash my suspicions once I brought them up to her. She said that the "hallmark" symptoms of BPD are really lying and stealing. Talking with her about the differences between seeing someone who has BPD and looking at the diagnostic criteria really helped me to understand. Maybe your NP or therapist can do the same with you? BPD is such a complex diagnosis, there is really a lot to it that isn't written down in books.