I've never been formally diagnosed with BPD but i think i have a ton of the symptoms and it has been alluded to by several therapists. I mask it all very very well, something i had to do growing up, i can tell when my thinking is just off the wall about things and i know my natural overreaction to things would be frowned upon and i'd lose people or be disliked and that is a very strong pull for me, so i store it all inside instead. I have managed to have a very positive very secure and loving marriage free of all the BPD stuff but i'm not so secure with friendships or women in general. And the therapy relationship is absolutely horrendous for me, my insecurity, fear of abandonment, love and hate extremes, etc etc are in full flow. But that is the only place the full extent of the BPD comes out. I think it's because i need to be vulnerable in that room, and because it is somewhat a parental dynamic which really threatens me.