My guess is that you've built yourself a modern romantic image of what a couple should be (aka : two maddly in love young beautiful people having crazy passionate sex every night) instead of the traditional one (two grown ups trying to build a family against the constant shitstorm that life is).
I'm not judgemental, as i'm almost in the same situation as you, except as a guy i feel i still have a bit more time (but not that much).