Im 18 and I just got married. I am extremly happy but I wasnt sure at all and from what I have heard from other dudes is........NO DUDE IS EVER SURE HE SHOULD GET MARRIED. Lol but seriously I wasnt sure and I am very happy now. I look at my marriage from a biblical standpoint to which helps me be sure it was the right thing to do. But if your not ready your not ready. At the end of the day you gota say could I see myself with this woman forever? If you can, then maybe stick to the relationship. But in another year or 2 if your still not ready and dont think your even beggining to be ready then id break it off. Like everyone else said its not really fair to her.