I have often thought the same. I am not in therapy. I used to be on a bunch of bpd groups of facebook but have removed myself. Once I was no longer being reminded of bpd 24/7 and got a good boyfriend who silently understands and work on mindfulness on my own, I became much better. I still slip sometimes but not nearly as much as when having a bunch of other bpd's in my life and being constantly reminded of it.
****I dont mean to ignore my bpd traits...because they cant be ignored, but improvements have been made when I stopped making it a main focus in my life.