Thank you every one for your replies.
@Rev yeah I can see behind the Bpd curtain..he has pretended to be that character. I randomly met a person who knows him. We spent a few days together. I could see which parts of this man he copied. He has even copied this man's stories and jokes.
My ex has been in contact again and I can see his language choices, spellings, slang and punctuation are completely different. Its like talking to a completely different person.
I feel like he has lied to me and taken advantage of my good nature
@sinistercomplex It confuses me trying to separate the BpD diagnosis from the person...BUT then when he pretends to be some one else and mirrors, it feels impossible. I feel like the crazy paranoid one.