Are cross denominational marriages a good idea?

I am an Assemblies of God protestant and am very close friends with a catholic girl. Would cross denominational marriage like this be a good idea? I know that the bible says to not be unequally yoked. But my relationship with her is literally shaking all of what I thought I've known as sure facts in my beliefs. Have any cross denominational marriages worked out in the past? What does the bible have to say about cross denominational marriages?