How do i stop my hormones from making me like other girls?

I have a mate for life, and I don't want to betray her by liking other girls... but for some reason, whenever i talk to girls, i get this feeling thats like crushing on them, even though I truly want to stay with my mate (and likewise her to me) how do i control my crushing so that I dont keep doing this... I dont want to bretray her or anything :(