This is a very very difficult and complex situation as you are dealing with a multitude of issues here.

He is going through a hell of a lot, none of which he was really going through in your first year of being together, and you wouldn't have possibly seen this one coming.

On top of the situations he is dealing with, you're dating a person who has some serious mental health issues of psychosis.

But more importantly, for your own sanity, who is supporting you through this ordeal? Are you seeing a professional? Like a therapist? You need to take care of your own health too.