people with BPD can have split parts of themself. even if your symptoms arent severe enough that you could tell for certain you have alters.

my mother has BPD and often tells me she has other personalities, which i have noticed. but again she recognizes her parts are still her, whereas someone with DID have alters but typically these alters believe they are separate and are someone independant of the "host".

i would talk to a psychologist or therapist further on this.

feel free to keep us posted!