Frustrating as hell

So this app will not allow me to post pictures so I have to retype this, I posted earlier about this, okay so i get horny quite often and my husband asks me for sex, and I really want to have sex with him.. buuuuuutttt I have zero urge to want to have sex with him even though I’m in the mood.. I feel so bad when I turn him down even though I clearly want sex but can’t get the urge to want to do anything with him.. what am I doing wrong here? I am so frustrated because I wanna have sex with him but have no passion or want to do it anymore.. help me 😔😔😔