Marriage, Sex, & Other Partners

I been married for five years and I’m starting to feel sexually frustration because I’ve always had a large sexual appetite but dialed back some because my husband doesn’t understand me sexually and judges . I have told him I wanted to divorce so I could see other people but doesn’t want to do that or compromise in the bedroom so I feel stuck. I told him that I’m going to start seeing other people sexually at first it seems to bother him but now it’s like he jokes about it . I’m sure if he’s seeing someone now or not I asked him but he’s says no I really don’t know what game he might be playing but I know something isn’t right just not sure what. I want to have sex with other people but it’s hard to explain my situation and I don’t want people to get the wrong idea about me what should I do? Any insight?