Hi there
searching11 ... .welcome to bpdfamily.com... .

Yep it's all too easy to ignore red flags when we are being idolized by someone... .I have a few of those T shirts
This doesn't sound like a person you can trust... .regardless of BPD traits, plus it must be rather unsettling to hear about other 'suitors' it seems she is content to keep hanging on. Would you consider your status with her as different than this?... .
This may seem a blunt approach as a solution to your question... .if you want to detach, and you want it to be effective, imo not communicating at all would work. When you have reached out with messages before, she repeats the same behaviour.  :)oes this seem a fair appraisal of the dynamic between you two?... .