I don't mean to sound rude, but I wouldn't consider marriage at all. You're about the same age as me, and I know for a fact that I'm not ready for marriage. No seventeen year old really is. No matter how well you think you know the person or how great you get along now, I can almost guarantee that after college when you're both technically adults and have your lives together, that you won't want the same things in life.

I'd wait before you move in together and plan marriage. Definitely wait.

Also, tell your parents to get a grip and butt out of your love life. They have no say in this at all. You love who you love, not them.

I'm not going to even touch on the religious aspect of this, because I'll likely just offend.