8. Attending Your First Wedding as a Couple (Hopefully not Your Own)
Once you've gotten through chicken-or-fish, filibuster-length toasts and doing the YMCA dressed in taffeta with someone, you are essentially war buddies. Well? Would you want to go into buffet-style battle a hundred more times with this guy? If he still seemed charming when your pumps started pinching your feet, it's probably a very good sign.