All of the discussions I've seen about getting married are kind of like "Wow, it's totally awesome, but the real price is getting heavier and heavier": Meaning that if you get divorced, men are paying for it in such a disproportionate way (not only money, but loss of their kids and lots more) that it may not be worth the risk of a divorce.
I view it differently (I'm over 50, so maybe that explains it): It's like a 19-year-old who is fascinated with some old Camaro with big tires on the rear wheels and a modified engine. It represents everything to him. He will be really cool, he can take off really fast and he will get lots of chicks with it. That's the daydream anyway.
You get a little older, and you think people who want to show off with a car (whether a Porsche or a Bentley) are just stupid.
And then you start seeing that a car is *just* a car. And a woman is *just* a woman. She is no more important than you are, certainly, because she is just a human being just like you. I don't want to degrade women, but I don't want to put them on a pedestal.
So if you see it from that point of view, another human being who demands a shiny bauble that my cost you many months work, and debt, and a person who is going to be a princess for her special day, and you are more than likely going to be working every day to support her (no matter what she says NOW) ... is a person I don't even want to be around or talk to, much less marry.
Maybe she just isn't all that your sex-befuddled mind is telling you she is right now.