i lived with a man who was going through active psychosis... and let me share what i learned, well, some of it. First and foremost, do what your head tells you is in your best interests. Chronic psychologically impaired behaviours need to be taken seriously, regardless of psychopathic or not. The lying would make it very difficult to know what is happening. It can be like living with an alcoholic or drug addict... meaning that a lot of what happens is controlled by illness and not by either of you per se.

you just briefly described ONE year of living together... imagine for a second describing 5 or 10... be realistic, how to you forsee that?

if you aren't ok with things as they are, that there are behaviours you cannot accept NOW... then break it off.. you cannot change someone and you cannot go into it with the expectation or hope if change as your deal-breaker. When i met my ex i knew he had an illness, and as much as i hoped he could improve, i was ok with accepting the man i met as he was.. it wasn't until it got much much worse did i leave.

if he has any sort of major disorder he will need to be extremely committed to change... and believe me, saying you'd die for someone is easier than the change he would face. When i learned that a lot of the behaviours i saw were so stereotypical and not unique to him.. that helped a lot. Your guy may mean what he says, he may not, but sometimes he might not even know the difference because he's in the middle of it. You need to make objective decisions.. for you seperate from your feelings of empathy for him.

i don't mean to just say to drop him straight out, but i do say quite strongly that you should drop him if you cannot accept him as he is now, knowing what you know now.

if you stay and he seeks help you need to do a couple of things... the first is to make an agreement with him that you intend to honor, like he goes into treatment, etc... second, get a therapist for yourself... try to find a support group locally for people with loved ones who have mental illness, it made a huge difference for me.

i hope you find answers that work for you... PM me if you ever feel like talking