I really want a kitten but my fiance hates them?

Iv always had cats growing up and couldn wait to get my own as soon as i moved into my own home. My fiance on the other hand was brought up in a home that hated cats and wont let me get one. I genuinely feel there is somethin missin in my life without a cat to curl up on my knee in the evening. Our 2 children absolutely love cats too and are constantly asking can we get one. My dilemna is should i just go against his wishes and get one or i should forever live with this feeling of something missing???