Hello, I am dating someone who I believe could possibly have BPD. They've seen therapists in the past and have been on medication from a young age. They are scheduled to see a new therapist soon. We've had fights because of this, but it hasn't been until recently that the severity of their problem has become apparent. I am willing to stay with them but want to know the proper way to go about it. I assume I'll eventually go to therapy with them, where I will get more information but I want to gather what I can from those with experience on both sides.