hi DiscardedLady, and

so, its a complex question(s) that you ask. its one that i struggled with myself.
as a starting point, all of us mirror. mirroring facilitates bonding. mirroring from our earliest caretakers is considered essential in development.
I can recognize that this is such a deep need of mine
i think that this is a very important realization. it occurred to me, much later in my recovery, that i was fairly dependent on mirroring, and on validation, of the things about me i most wanted to be loved for. it wasnt especially easy for me to see, but i realize now that for me, it was a significant part of the bond i felt with my ex, and the struggle i had over the breakup.
is it something our exes can pick up on?
i would say sure, to some extent. people with BPD traits fall fast, and they fall hard. we all tend to put our best foot forward in order to attract a potential mate. we pick up on queues, we present the best, most likeable version of ourselves. people with BPD traits are no exception to this, and can be even more extreme about it. they can even come to resent us for it later on, which can feel pretty confusing.
is it a malicious thing? i dont think it is. i know that similarly, a lot of us wanted to help our partners heal, for example.
Maybe our shared history of abuse by our parents and our similar coping strategies when we were younger made our bond feel special.
when you meet someone you can identify with, on a deep, intense, and relatively quick level, powerful things happen, and it can feel like the romance of a life time. and in some ways, it is. all of it can make for a loaded, complex, passionate bond.
the problem with that is that it is not necessarily the foundation for a healthy long term relationship. our partners have complex inner struggles we arent necessarily privy to. inherent distrust issues, for example.
people with traits of this disorder significantly over emote and over express themselves (in good and bad ways). its not that they are lying or dishonest, its that they are speaking in extremes, extremes that can be fickle and fleeting. an example i often use is that ive probably told every girl i ever dated that they were "the most beautiful girl in the world". i wasnt lying to them or trying to gain anything. but its not something i still believe today, it was an over the top expression.
its another example of something you tend to get in greater extremes with people with BPD traits. the hard part is that we invested a great deal in those expressions, the words, the actions, all of it. to see it seemingly suddenly disappear can feel alarming and confusing, and it can feel like a rejection of us on a very deep level. healing involves seeing it (all of it) for what it is, grieving it, and rebuilding ourselves even stronger than before.
and thats just the short answer
so what was the argument about and what happened? how long has it been since the breakup?