So I live with my fiance and he constantly rejects me sexually and it hurts what should I do?

Here's a bit of background we have only been together a year and sex has always been great. But here lately he had just been rejecting me all the time. But almost never rejects getting head from me so it leaves me feeling empty and stupid for even trying and I try to talk to him but he just said he's not in the mood. And tonight I surprise him in his favorite lingerie ( a maid outfit) and he said oh your cute and hugs and kisses on me. And I rub on him with my body and he completely rejects me and pushes me away and says he's not in the mood. I just felt very unattractive and very dumb for even trying. A little advice would be great.
So I live with my fiance and he constantly rejects me sexually and it hurts what should I do?
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