People with BPD (pwBPD) will try to maneuver themselves as the sane one and posture as the victim. They'll claim you're the problem person, the crazy one. Sadly, they're generally adept at being so emotionally convincing that people will believe their claims as virtual facts.
It is incredible how convincing they can be. Some will eventually see the light but you really have to get used to being considered the bad guy. And it doesn't matter what they do, they'll always blame you. I