Is it bad that I feel like I want sex more then my man does?

So me and my guy have been together for almost 3 years and are getting married soon but I could have sex everyday and be super happy but we don't we maybe have sex once a week. He has a crazy work schedule too so that doesn't help. But I crave it everyday and sometimes I'll ask and he tells me no because he is to tired from work. So I feel stupid when I get turned down so I don't try to ask a lot I usually wait till about the once a week where he starts it. He says it's only because of his work which I do believe but I feel weird that I crave it so much more then I think he does. Also, I get so hurt when he turns me down or when we don't have sex as often. Is this normal? How should I feel better about this? Please help.