Environment has a lot to do with triggering BPD symptoms for me. Someone says something that reminds me of something else, a movie, a song, passing by a place. To me, I am triggered most by memories. Even when on here, when I'm writing, sometimes I hit a chord and go back in time....trigger myself.

Be mindful of what you say....you may mean something harmlessly but the WAY you say it, the facial and body expressions involved, or the fact it brings back memories of someone else or some other time can do it. Maybe write a journal of things that you say or do that seems to trigger her. Figure out a pattern. It may not be something directly on the surface. Do this....but don't be obvious about it. She might think that you are calling her crazy or you are looking for things to fight about. If she's open about it, ask her to directly let you know when you do or say things that she takes wrong or gets her upset.....and keep in mind that in most cases, it's probably NOT you. And thank you...for her....for working on "getting it". That's something that many of us don't have....