Was her old relationship of 3 years a lie?

[IamDevastated]

One of the things that my exBPD used to hook me in was she was always ranting on about how she was soo faithful once she had feelings for a guy and that she didn´t even think about other guys when she was in love etc etc.

She also kept talking about an exBF she had several years prior to meeting me. She claimed she was with this guy for a full 3 years and that it was the best relationship she ever had and he was her only true love etc etc.

Me and my exBPD were friends for 2.5 years before she confided to me that she was in love with me and we had to become lovers. A few days later she split me black and I have gotten the hater phase of a BPD relationship ever since. I am now NC from her. And she doesn´t contact me either. But that´s not the point.

This guy she kept talking about... . Well, back when me and exBPD were friends only she was with loads and loads of guys. She had a relationship circa every 3 months and they NEVER lasted longer than 2 months. Never. Back when she split me black she immediately hooked up with another guy. Yup, you guessed it exactly 2 months later it was over. Having seen this pattern with her for almost 4 years now and experienced it on my own sorry butt I simply cannot fathom my head around the fact that this girl is supposed to have been in a relationship with someone for 3 years?

I mean with all the problems she has, her behaviour is absolutely extreme and unforgiving, I simply cannot imagine how she could go 3 years with someone... . not that a man that would take all her abuse for 3 years doesn´t exist... . I´m the perfect testament to this  But I can´t imagine her fleeting and shallow emotions would last that long... . or that she would be able to totally sabotage it during those 3 years.

I´m beginning to think she only used this story to mirror me making me believe how she was this faithful demure girl (when nothing could be further from the truth). She also used him to abuse me she said around christmas 2012: "Sob sob... . I´m still hoping to get back together with (his name)"... . yup, I was HORRIFIED how she could sit and say that after everything that she and me had been through.

Also I noticed this back when she dumped for random-guy. After 2 months she told me that the excitement was gone and it was now boring being with him. A girl with this mindset. Could she have been in a 3 year relationship? Or was it just another of her LIES?

[Octoberfest]

My BPDex claims to have been married at 19 and been pregnant when she found her husband in bed with another woman, had the marriage annulled, and the baby aborted.  But she never, ever cheated on him or ever before me.

And then she cheated on me, for the entire 9 months we dated, with multiple different people, at one point having 3 different guys in 3 different cities.

Sure.

Edit:

I don't really care if the story is true or not. With all the hitty choices she made with her life up to this point at 22, I couldn't dwell on her past for a second if I wanted to make the relationship survive.