^^^ I gotta agree with that opinion above. You're way too young to be getting committed and trying to be monogamous right now, and I agree that that's a challenge even under the best of circumstances, especially for men. You're right at that age where the urge to be with a variety of women is completely normal. I hope you have enough courage and honesty to tell your fiancee that you're not ready to be committed or married right now so you don't make a mess of that. It's a heck of a lot easier to stop the commitment train now than to get married too young, make each other's lives a living hell, complicate things further by having kids, and then tearing that family apart in the end because you got married too young. Marriage is hard enough even when you wait till you're older and you've sewn all your wild oats beforehand.