As I equate poly with multiple loves-this makes perfect sense to me.
(it actually makes sense in a variety of ways).
My boyfriend and I do have a sexual relationship, but compared to my husband-he has damn near no sex drive. BUT-that's totally ok cause our lovelife is to diverse with one another. We're romantically, spiritually, socially and intellectually stimulated by one another-when the sexual mood strikes him-great, but it's not a requirement.
I think its great that you've found something that works better for you.