Has anyone experience with a friend who later revealed to be psychopath in hindsight? They are clever at sensing or testing whether you are becoming wise to them. Unfortunately like me many will only realise the final act of deceit and act upon it, being unaware of many acts this person has been responsible for. They seem to push the friendship as far as it can go without breaking it, this is revealed after noticing they become worse when you are in a weakened condition or temporarily dependant on them.
I was taken advantage on and off for over a decade by a so called friend who later revealed to be a psychopath. I was na´ve, I didn't really know what they were and thought they stood out more and were more like 1 in 1,000 than 1 in 100.