For whatever reasons, psychopaths tend to find me fascinating lol so I have a few in my life. Two of the ones I know are married, and their relationships have been successful. The people they married are very resistant to manipulation, lying, and gaslighting and know how to counter it, and also just aren’t afraid of said psychopaths (the lack of fear is an absolute must or it isn’t going to work, period)... so, I would say it takes a special kind of person to have a successful relationship with a psychopath, but it certainly isn’t impossible by any stretch of the imagination.