Thank you for the suggestion, and I hope I didn't offend you...I think what I should have emphasized instead is that my moods, whether I hold them in/let them affect others or not, do not arise from interpersonal issues/relationships. In other words, I'm not 'triggered' by other people, at least not in a direct or obvious way. I mean, when I was cheated on - yes, I freaked out. But I don't think I'm extra sensitive to the way others treat me in general...my 'thin skin' pertains more to things like external and internal stimuli, if that makes sense. I tend to get really low/agitated when I'm either sick or stressed about work - in those cases I would say my response is way over the top, but when someone disappoints me, or I have a fight with someone, I can manage pretty well (unless of course I'm already depressed or really anxious). I guess I feel like it's more of an 'existential' feeling of vulnerability...I get 'high' and then severely let down by my own mind more than by others. I'm not sure if that really means anything as far as BP vs. BPD though...but when I think of BPD, since it is about personality, it seems that the symptoms should be present pretty much all the time, and that just isn't the case at all for me.