Hi @Tracker ,
I totally understand where you are coming from as a carer. Everything you are pointing to is very characteristic of a borderline.
A borderline's mood is often very reliant on their environment and what is happening around them. In other word, when the weather is good, they are happy. When the weather isn't good, they are not good either.
I've lived with BPD for many years. Like your daughter, I was diagnosed when I was about 17-19 years old, and I didn't really begin to 'recover' until I was in my early 30s. It took me until my 30s to realise "I can't continue living like this. I can bear my own self." That is when I sought help. That was when help came to me. That was when help worked!
Prior to that, it was everyone else's fault. I blamed it on my depression and anxiety and everyone else. I didn't 'wake up' until I came to the point of simply having enough of being.
From this, until your daughter realises something is not quite right, there's little you can do. Borderlines tend to hurt those they love the most. I needed a suitable psychologist to really challenge how I wanted to live life.
There's no easy answer. They need to hear it from someone 'outside', otherwise they think you are just 'nagging'.
Be patient. Just be there for her. Offer suggestions e.g. "have you ever considered seeing a specialist for BPD targeted therapy?" versus "you need to see a specialist for BPD targeted therapy".
As a pwBPD, I HATED being told what to do - I felt like people were trying to control me. Thats why, even my psychologist, to this day, "invites" me to try things.
I know this is a lot. I'm not sure if any of this will help you @Tracker .
BPDSurvivr
Thanks for the tag @AussieRecharger