i have massively gone off sex... for reasons other than the original poster, and Dh reacted in a similar way.
I got so fed up with his constant needs for penatrative sex and him not willing to compromise- even though i was.
so we reached an agreement, for one month we would have sex every night whether either of us wanted to (or was up for it).
he was well chuffed for the first 10 days, and then the shine wore off... and he started strugging with his commitment.
by the end of the month... he looked at me... with puppy dog eyes and said ' do we HAVE to?'
i said 'see that feeling right there..... thats how i feel. do you love me any less?'
he said 'of course not, dont be silly, i love you no matter what.'
I said ' keep hold of that feeling and next time i say i dont want to, realise i'm not saying i dont love you'
That was about 6 years ago. we still have penatrative sex less than he would like but more than i would like, but we came to a compromise.
Ps i still dont spontaneousely kiss him though, because in his mind that means an invitation.
we are in a strong and loving relationship and we have worked it out - for us.