My husband is hooked

Sometimes I feel like I'm not normal my husband want to have sex 24/7 he is 34 and I'm 27 we have 4 children and have been together for ten years I even feel bad sometimes for not being in the mood my friends all say oh you should be happy he is still really into you but i don't I feel like sex is such a big part of our relationship and there are other important things he is very attractive but when I'm not in the mood he says oh it's because your not attracted to me and that's not true ugh maybe I should get some female viagra or something