Hi
Kevind553!
Welcome to BPD Family. You will find a great resource here in the people as well as the info on tools you can implement to make the situation better for you.
I wanted to clarify some things that you wrote. You said she left you before your 7 year anniversary, and then you mentioned that you moved out.
Are you saying she got a new guy, rubbed it in your face, was still saying she loved you, and then you moved out?
Just trying to understand sequence of events.
Keep in mind I am in no position to diagnose anyone. Especially with just one side of the story.
But my first reaction to her thinking this is funny is that it seems more like Narcissist Personality Disorder characteristics than BPD. pwBPD do not get pleasure from giving you pain. They feel intense shame that they can't control themselves. People with NPD actually get some pleasure out of inflicting pain on people. It makes them feel powerful and above you.
They do have a lot of other overlap in other behaviors though. Check out these links.
NPDBPDKnowing this might help you think more clearly about what your next steps are.
Are there any other events during the 7 years that might give us some more insight into your relationship?