Yes I have the same issues as you. I am multiple people. If you've ever seen the movie 'Gia' one of my favorites is, since IMO Gia Carangi possibly had BPD, when one of the characters named Linda says that 'she was a different person to everybody... and if somebody said they really knew her, then they didn't know her at all.' That's pretty much me to a T. I can't say I'm the same person around everyone. I think all humans are like this but for a BPD sufferer it's worse and much more erratic... intense.

Like for example - with my mom I'm often the victim or extremely childish as a means of securing her affections. With my boyfriend I'm the intense femme fatale but also extremely possessive and obsessive, that side of me coming out at full force that I usually keep locked away. With an acquaintance I'm the cool, detached James Dean type who's kinda too good for society. So yes, I take bits and pieces of personas to make many of my own. It's a skewed reality and I often keep separate selves for separate scenarios as a way of surviving, thriving or getting what I want... sounds bad but it's true and it's an issue with my BPD.

Long story short you aren't alone.