Should I still marry her?

I'm a Mormon. She's a Catholic. I wanna marry her. Her family is a devout. I can't change my religion because I have a deep conviction of its truth. I really love her but, she doesn't want to be converted as well. In our religion, a temple marriage is really essential. I don't know what to do? Should we end or relationship? Her parents said that if ever she marries me, they wouldn't attend our wedding. We don't really talk about this and we tend to change topic every time this comes out.