Valentine's Day is sold to us as a moment to celebrate romance: we should buy cards, roses and chocolates. Go for fancy, dimly lit dinners with our significant others. Make loving declarations.

For far too long, our marriage-prep classes have been generic,” said Julia Dezelski, an associate director at the U.S.

Lots of people live together without being married, and there's nothing wrong with that, but if things go south or one ...