Did she have Border Line Personality Disorder?

Someone with BPD is afraid of change. They are either good or bad. No in the middle. This event is not enough information. It is one sided. I would need to hear her side before even thinking about a proper diagnosis. Breaking up with you did not sound like BPD but when you mentioned she hacked into your email and comparing herself to her, it started to sound like BPD. Yes, I do think you should of broken up with her, she was drama and annoying.