If that's your photo on your Profile Page, you look quite young. How much sexual experience have you had, all in all, same & opposite sex? Could it be that you're not completely committed to the idea of marriage at this point in your life? Could be you've got some more living to do.
Hormones and peer pressures, family expectation and the romantic clouds that Floyd away with out so easily at this age--could be this Tennessee Lassie isn't isn't feeling at all comfortable in this roll you've been cast in to play for life.
Maybe you are gay--have you had a gay relationship? Or maybe you just don't want to get married now. Maybe you don't want kids now. Maybe you want a career.
You posts have a lot of holes in them.

One thing's clear--you should have at lease a two-year engagement and do a lot of thinking and talking.

... back to the earlier post ...