I agree with remember the facts advice. For my own mental health I wrote down a series of events as I understood them. They differed on almost ALL aspects from what my ex said to others and me. I did this just for my own benefit. Never showed them to anyone, but needed to see clearly in black and white just what I thought happened vs what actually happened/he said. It can be really scary to see it all in front of you. I think I stopped when I got to #28...it was obvious that he was lying. The realization of that almost took my breath for months. I kept re-reading my list just to make sure.