I had a friend who was diagnosed with BPD, it was a tough relationship to manage, because of self-seclusion my friend subjected herself to. Talking with her was always a one-sided conversation about herself, and her negativity about life. As much as I wanted to remain friends, couldn't deal with the strife of her disorder. It lowered my self esteem and changed the way I viewed things in my life. It was TOXIC. We decided to go our separate ways, I sometimes call her to see if she is progressing with psychotherapy, but she never gives an actual answer. I guess it's just one of her idiosyncrasies that I'll have to deal with.