I'm the same but the opposite too! I'm in a loving, longterm relationship with a guy (and I am definitely sexually attracted to him) but I am wayyyy more sexually attracted to the female body than the male one. But I have no emotional attraction to women in a romantic way whatsoever. Conversely, I find that I'm attracted to guys when I get a feel for and like their personality. I've noticed this about myself fairly recently too.

Anyway, I don't have any advice for the situation other than to say that you're not alone and I'm betting it's a fairly normal thing.