Just a few questions

My girlfriend has BPD and is currently in treatment bc her mental health wasn’t doing so good. But I just have questions for others who have it for perspective so I can be a better man for her

Does being her bf automatically make me her fp? And should I be upset/worried if I’m not? Or is that something I should not even worry about/entertain bc it’s unhealthy? I feel like I would be based off how well she treats me but she’s never mentioned the fp thing

Has sexual identity in terms of asexual to promiscuous ever changed for any one of you? My girlfriend was (her words not mine) promiscuous but said she’s always really felt asexual, and I’m the first person she’s ever told since I’m her longest relationship...I just haven’t been able to find much info on that

And last thing I forgot if I already asked this but should I be worried about the identity changing/lack of identity? I’m only asking bc I don’t have BPD but I have abandonment issues and if she is going to decide she doesn’t love me one day out of nowhere I’d just like a heads up. I wouldn’t leave her if anyone said yes but I just don’t want it to be an abrupt surprise.

Any answers would be really helpful, as my PTSD is kicking my ass and I’m getting overworked so I’m a bit loopy rn.