Had sexy dream, now he’s mad, help?

A few nights ago I had a dream that I have zero memory of but apparently it was with an ex and I was acting out the dream in my sleep. My husband asked who i was doing it with and I gave him a name which he won’t tell me and I can’t remember at all. I understand his hurt completely and his insecurity. He feels I can control my dreams though and that this is a result of what I fantasize in my waking life and I can’t blame my sub conscience. I don’t fantasize about my ex’s at all and I don’t know how to prove that to him.

I’ve apologized, I’ve tried to talk to him and make him feel secure because he’s the only man in my life and the only man I want. I love our sex life and cheating is definitely something that never crosses my mind. He says apologizing isn’t enough and words aren’t enough and I need to show him the things I’m saying. I have no idea how to do this and how to prove something that’s inside my head. I’m very affectionate with him everyday but he says I do that for my own need, not to make him feel loved. I try to show him everyday I love him, I want him, and we have sex multiple times a week that I initiate and never turn him down for either.

Does anybody have any ideas about how I can show him I don’t want my ex’s, I just want him and how to show that I’m apologetic in a way that I’m maybe missing? I’ve asked him to express his needs but I’m told it’s up to me to figure out what needs to be done to make it better, I’m at a loss guys ☹️