Marriage is not about “Is this going to work?”; it’s about “We are going to make this work, come hell or high water, because we love each other and we belong together.”
Marriage is about knowing, beyond a shadow of a doubt, that you are fallen and so are they. The secret to a marriage that lasts is each of you working to become more Christlike, both separately and together.
Aiming for “good enough” is not enough. Your “good enough” and their “good enough” might not be the same thing. You must have a common definition of “good enough” to aim for. And Christ was the embodiment of goodness and perfection.