Totally right. I told this story to an ex who is a therapist and she said almost exactly what you said. The BPD wanted the satisfaction of knowing I still cared. Well it hurt her broke azz too because she had to come out of pocket with a large chunk of her ticket.She didn't want you. She just needed to know that she could have you and you showed her that she could. Mission accomplished on her part. Mission. Failed on yours. Do not pass go. Do not fall for this trap again.
It crazy man this is the only chick that makes me look like a fool. Im like Wiley Coyote falling for every trap. I am usually a pretty stoic strong dude.