He stands you up.
You’ve been set up on a blind date and you’re sitting at a restaurant, red rose on the table so that he can recognize you. Only he never shows. Did he see you and make a mad dash for the exit? Possibly. Did he get hit by a car? Probably not.
 
If for some reason you get stood up before your date, i.e. he doesn't show up at all, or he calls/text messages/e-mails with a flaky cancellation, consider yourself lucky. At least this dating loser didn't waste too much of your time by taking you out and then ditching you!

Part of a single gal's contingency plan should be that if for some reason she gets stood up, her girlfriends are there to break the fall. Which is why you should always designate a backup, a trusted gal pal who can whip up a good time on a moment’s notice. The moment you get stood up by your date, call your Backup Girl.

He ditches you mid-date.
He picks you up and takes you to a restaurant, coffeehouse, or some other dating destination. You think things are going well. In fact, you're feeling incredibly charming right about now. Then he excuses himself for a minute, supposedly to use the restroom. Five, ten, fifteen minutes pass and he doesn't return. At first, you think maybe he's having a case of the nervous intestine and you feel sorry for him. But then it becomes clear that your date is not coming back. Whether the maître d' saw him making a beeline for the exit, or his car is no longer in the space he parked it in when the two of you arrived, you have to face the harsh reality. You just got ditched by your date.