Hi Borderlinestar: To a person with BPD (pwBPD), feelings equal fact. Their type of paranoia is Paranoid Ideation and not Delusional Paranoia (unless there is some co-morbid condition, along with the BPD). Perhaps the quote below might help clarify the situation for you.
The Difference Between Paranoid Ideation and Delusional Paranoia
Paranoid ideation is not the same thing as the delusional paranoia that can occur during psychosis. Delusional paranoia is based on false thoughts and beliefs.
For example, if you are experiencing delusional paranoia, you might believe that the government has bugged your house and car in order to keep tabs on you.
If you are experiencing paranoid ideation, you might see two people in the hallway talking and believe they are talking about you.
The links below might be helpful in exploring your sense of self, which can be an issue when you have a family member with BPD.
SELF RESPECT AND OUR SENSE OF OURSELFhttps://bpdfamily.com/message_board/index.php?topic=121173.0;allBELIEVING IN YOURSELFhttps://bpdfamily.com/message_board/index.php?topic=78298.0;all