BDP experince

What best defines the "borderline" personality, is great difficulty in holding on to a stable, consistent sense of one's self: "What am I?" these people ask. "My life is in chaos; sometimes I feel like I can do anything--other times I want to die because I feel so incompetent, helpless and loathsome. I'm a lot of different people instead of being just one person." The one word that best characterizes borderline personality is "instability." Their emotions are unstable, fluctuating wildly for no discernible reason. Their thinking is unstable--rational and clear at times, quite psychotic at other times. Their behavior is unstable, often with periods of excellent conduct, high efficiency and trustworthiness alternating with outbreaks of babyishness, suddenly quitting a job, withdrawing into isolation, failing.
Their self control is unstable -- ranging from the extreme self denial of anorexia to being at the mercy of impulses. And their relationships are unstable. They may sacrifice themselves for others, only to reach their limit suddenly and fly into rageful reproaches, or they may curry favor with obedient submission only to rebel, out of the blue, in a tantrum.
Here I bring up emotional blackmail, and I have to admit that I feel sort of a traitor here, because when I first read about this I saw I was extremely guilty of it. Emotional blackmail is certainly not exclusively a tool of borderlines, but every time a person with BPD threatens to self harm if somebody doesn't do something, or threatens to do anything in an attempt to manipulate somebody else, it is called emotional blackmail.