Just to add to this.
I lived with a certified BDP for about 1.5 years. She was diagnosed with it and has been under therapy of some sort for most of her life.
Like many of you she seemed perfectly normal when i first met her. Pretty, well spoken, funny. And she came on like gang busters when I first met her. Sex right away, declaring her love for me within a week or two. Saying how i was her knight in shining armor. Hooked me immeaditely.
Soon I began to see many red flags. Drinking, many failed relationships, many different jobs, strange stories about her past, changed her hair style and color many times, could go from one hobby to the next like the drop of a hat and never revisit the old one again. She began to have depression, raging like you have never seen someone rage. I mean could literally go on for hours screaming over nothing. And then the next day be the sweetest person you would ever meet.
Soon when she began to doubt my true love for her she made up stories to attract sympathy. Saying she was raped in a parking lot, saying she was attacked when she took out the garbage and even had perfectly placed slice marks on her head to "prove it". Of course since I had found out so many of her past stories were lies, i really didn't believe these either and of course those turned out to be false as well. All to get my "attention".
After a while her daily drinking became so bad, her raging so bad, I was ready to move out and on with my life. Thats when she took a knife and in front of me slit her wrist wide open. Thankfully she sliced it parellel and not across, or she would have died right there. I mean her wrist was wide open, cut all her tendons, everything. She also o d'd on her her meds to try and kill herself.
She really tried to get help. I mean she realized what she had and didnt want to be that way but there was nothing she could do according to her.
Finally when i left for good, she hit and sliced herself and then called the police saying I attacked her-which I didnt. I was arrested, put in jail for two days, humiliated. I eventually got everything cleared but only after paying court costs, lawyer fees, and attending anger management class for 15 weeks at $50 a pop. If anyone knows me they call me the most laid back person they know. I never get angry, which is why that class was such a joke, and the instructor knew that after a week or two and gave me a glowing report to the judge.
She also stole my car, slandered me to everyone she knew. All because I left her.
There are a million other stories I could tell about her in the time we were together, but suffice it to say they are all very similar to the ones I gave here. Lets just call it a neverending soap opera.
I was sucked in. I thought I could "fix" her. When i got out of that relationship eventually it felt like all the life had been sucked out of me. Thats what they do, suck the life out of you and then move on since they always need new forms of excitement and drama to keep them from thinking about their own depression.
I am telling anyone now, if you have any inkling that your gf or wife has borderline personality disorder, run like you have never run before. I have had numerous psychiatrists tell me BPD is the one disorder they are actually scared of. It is untreatable.
Just get the heck out.