Per your last question, I imagine much of this could be due to the tension the two of you are feeling regarding the religion issue. Any big change in a relationship (and changing religions is a big change, whatever some might say) can result in this sort of apathy.
YES, I am still insanely attracted to my husband. Every time I see him being a wonderful father to the kids, every time he cooks dinner "just because", every time he comes home from work tired and wanting to fall into bed, but stays up to help me with the kids and the house....When he's sweaty, or working hard, or kisses my neck while I'm cooking, or just SMILES right...It's "Mommy and Daddy" time!! I'm pregnant with our seventh child, so I shouldn't be surprised. I CLEARLY love being with my man. ;)
We've been married (and having sex) for 15 years. We've known each other for almost 18. I'm still as attracted to him as the day I said "I do". YES we have gone through dry spells. Though I've never been repulsed by him, sooo...
I would consider couples counseling? You don't have to go to a Christian counselor, though your husband may request it. Just find a good therapist. And you should go, yourself. They'll be more able to help you than us moms here. :)