Stood up

[Britney]

As in To get stood up or To be stood up
To have gone on a date, except to find that youve been left by yourself because your date never showed up.

[Justin Bieber]

When someone you have previously made plans with does not show-up, leaving you utterly alone; often on a date.

[Tanya Shivari]

When the guy/girl said she would go out with you only to find out she flaked out on you.

[Donald Trump]

To take your last stand. And then to find you are alone, waiting in the sand.