HELP! Does anyone else have a S.O. like this?

I'm absolutely crazy about my boyfriend and we're really good together except for the fact that he hardly ever wants to have sex and I do. Like ALL the time! I've tried so many different things to get him to want to have sex more and I'm getting to the point where it's kind of hurting my self esteem because I don't feel like I'm that attractive to him. He always tells me that he does find me attractive and that he's just not that sexual of a person. When we do have sex it's so wonderful and amazing. I don't want to feel like it has to be a chore for him but I just can't help that I'm so attracted to him. I guess that I'm just looking for some kind of advice or reassurance that I'm not the only girl out there that deals with this kind of problem.