I never want to have sex

I have a very handsome man that I’ve been with almost 6 years and we have a 4 yo son. I genuinely feel I could go the rest of my life without ever having sex again. I’ve been to the gyno and he says everything is normal with me. I feel horrible because my man deserves to have a woman that wants to have sex with him and it really hurts his ego but he tries to hide it from me but I know it has to bother him. I always tell him it genuinely has nothing to do with him that there’s nothing wrong with him which is the real truth. I don’t even play with myself or anything like that I never am horny. Is there any supplements I could take or anything I could try to make things better?