Yes. Mine changed because I changed it. I had BPD my entire life. My providers are certain I was born with it. I’ve always only ever known extremes and unstable relationships, until now- after a year of intense DBT treatment. I have changed my personality, my entire perspective on life, so yes. I hope the OP sees this. (I’m also bragging a bit, it only took a year to recover from a disorder I unknowingly had my entire life once diagnosed and was informed.) You have to rewire your entire fucking brain, but you can.