Partner misreading body language but swears he doesn't?
My partner has a background a little bit in psychology and is also autistic. He keeps saying that he can very easily pick up on body languages, mood shifts, etc because of his background in psychology but he always seems to be misreading me and my teen. Like for instance recently I handed my partner something that he needed in the moment that happened to have belonged to my ex-husband.
My partner really truly thought that my son had a negative reaction to something of his father's being handed to my partner. But that absolutely was not the case my son did not care. His father is a terrible person and he cut the man out of his life for very very good reason. I had a conversation with my son just to absolutely make sure that it was okay and he said no not a problem at all I don't care. But my partner seems to be hyper fixated on this and will not accept my answer or my son's answer that there was literally nothing wrong with it because he keeps insisting that he is picking up on body language that says otherwise. Honestly the only body language we're having at this point is frustration because he's not listening.
I don't know how I can help him to see that he actually is not reading us like he thinks he is. I'm not like upset with him or anything I just want him to be able to like if he's going to pick up on our body language and stuff I want it to be what we're actually thinking so that way we can avoid any unnecessary issues in the future because even when I tell him something directly he has it in his head that my body is telling a different story. (Maybe because I have a lot of past trauma that has impacted how my body presents emotions? I'm not sure but it may be a possible explanation.) I'm not sure if maybe he's hyper fixating because of his own emotions that are maybe a little unsure about things or afraid I'm going to leave like everyone else but I just want to figure out how I can help him because he's just a good person with a huge heart who will drop everything to help someone and I care very deeply about him.
But if he's going to keep misreading me and then telling me that I'm wrong about my own feelings and then not listening when I'm trying to tell him that this is what I'm actually feeling it's going to cause more problems in the future. I want to help him know that he is safe with me but I also want him to know that I know my own feelings and my son knows his own feelings and I'm good at communicating them directly. I also feel like it's not ok to tell me how I feel especially when I've stated it directly. Basically I guess I just am trying to figure out the best way to help him while also continuing to advocate for myself and my child when my partner is misreading us. But I don't know how because he's so insistent, is there anything I could try that would help the situation?