I think it is entirely possible that the psychosis could have been from his past drug use. From what I read it can come and go up to 18 months after last use. Which was one reason I had said he was welcome back. Its scary but I knew it was a possibility. I was surprised and confused that the test came back clean after seeing him like that.
I am really sad that the whole thing is ending. But I can't be with someone who wants out of the relationship. Its just so sad.