How can a BPD person be diagnosed if she does not admit the sympthoms?

Even tho she has kinda all the symthoms (without the extreme impulsivity and self harm), she does not admit them.


She says she does not have a big fear of abandonment - but almost daily she wanted reassurances that I don't leave her, asked me different questions to verify this, dreams of me leaving etc - of course all this she will not tell to the psy

She says she has been all the time very attached of me and she appreciated me - however plenty days she was very mean and distant, not talking, for no reason, not even regarding towards me etc - of course she will not tell this to the psy (maybe she is not even aware she is like that often)


She says that she does not have big of a emotional swings, she says is because she is only a little tired - but almost every day she's like a different person (either depressed, detached, either happy, distant, loving, energetic etc)



She says the unstable relationships that she only had is only because she was "unlucky" or the others were not attached to her, she does not admit on having a fault on this

etc etc

She says to me that she often has feeling of emptiness (but I don't think she will tell to the psy), definitely concentration problems (often she does not listens when I talk to her), big mood changes for no reason, periods feeling down, does not sleeps very well, gets very concerned/paranoid for very little things, very bad self image even tho she's pretty etc

How can a psy diagnose within 1h a stranger if she does not admit nothing?


As she is more of a "high functionning quiet borderline" to me, and also I saw her symthoms only after a few months of living with her, I really don't think a psy can diagnose her.

What is the solution then? She will go see a psy, not admit anything, he will say she does not have bpd. She will put even more blame on me for insisting that she has a problem...