Hi tammym1972
Yes I can relate. pwBPDs sometimes move from relationship to relationship as one moves across stepping stones on a pond.
My ex "found" another partner very quickly. I know they were soliciting each other toward the end of my relationship with her, so that explains some things in my case. Many people here had cheating by the pwBPD around the end of their relationships, mine was the same in this way.
He says this new girl just gets him and I never did, in spite of living with him for 3 1/2 years. He says we have no connection. That sure isn't what he was saying in the first few years so its all been a shock.
I think this is quite common. My ex said this to me toward the end of our relationship. She also said we had "no connection" toward the end of the relationship. I too, felt shocked.
One way you can look at this statement is in a hopeful way. I made some decisions to get separate and distinct from my pwBPDex. You can use this statement as an affirmative point that you don't carry the same problems as your ex.