I love my husband but....

I love my husband but I am truly not happy with the sex. His penis is small and I never have an orgasm unless he performs oral sex. Because the sex is not interesting to me, I never want to have sex with him. We want a child so I do go through the motions. I really feel bad because I have had dreams of having g sex with other men. I do not know the men in the dreams. I want to enjoy sex with my husband but I don't know what to do. Please someone give me some advice.