Approaching Delusions About Partner In A Healthy Way

TL;DR - How does one (the person with psychosis) go about discussing delusional thoughts and hallucinations that are about them (for example: about them secretly hating you and ESPECIALLY about them cheating on you) in a healthy way?

I often have hallucinations and delusions about my partner cheating on me or secretly hating (ect.) even though he's not. Despite having Insight, I still become highly suspicious and start to try to ask him questions then look for signs that will help me "catch him in the lie", completely believing in that moment that he cares about me and these topics are upsetting to him; I'm almost entirely convinced in that moment that he doesn't care, or even takes glee in betraying me, and don't always consider he'll be upset in that moment.

I try to be mindful, and I always avoid being accusatory or being harsh at all, but I still mess up in being considerate enough and I don't want to be that way AT ALL. I would just not bring it up, but if I keep it to myself, I end up believing it after sometime or at least being very suspicious and distant which is also unhealthy and very upsetting for him. Instead of pretending like it's not there, I choose to talk to him about it so he's not confused and stressed as well as to avoid accidentally creating distance between us.

He knows about my psychosis and I'm currently in the process of finding the right medication, but in the meantime and in case it doesn't go away or I have another episode, I want to know how to approach these conversations from the perspective of someone IN the delusion and trying to get out of it without it negatively affecting my partner as much as possible.

I don't currently have a therapist who's a specialist in psychosis, but I'm in the process of finding one. I tried to talk to my last therapist about some of these issues, but he was approaching it from more of a "typical relationship" way, which wasn't very effective because these issues aren't simply JUST emotional/past trauma/ego/ect. and the psychotic component complicates things A LOT because in my mind, in those moments, he IS with almost CERTAINTY lying, cheating, and incredibly degrading to me in his head (even though he's a total sweetheart) and I can hear him "ACTUALLY" cheating on me and saying terrible things about me and my body which affects me as if it were real, except it's not...

If anyone has advice on this sort of thing, personal experience and stories of hope, I'd really appreciate it.

I don't normally post questions about things but I can't ever find advice for the people who actually have psychosis whenever I look things up online so hopefully this will not only help me, but also anyone else searching for this query.