Have you ever been in this type of situation? (details inside)

Okay, here’s the scenario.
Someone you’re acquainted with, dared you or made you do something delibrately misleading. Something that you had to do, knowing that your friends will believe it to be true.
After doing that thing, you feel extremely guilty and sad and scared. Scared that if you tell your friends the truth now, they’ll lose all trust in you and that they wouldn’t want to be your friends anymore. They’d think that every word you utter is a lie. Scared you’ll lose some very dear friends and that they’d see you as a bad person, whereas, in truth, you did what you did under some threat or pressure, and that if you told them that, they wouldn’t believe you.
Have you? What would you do in this type of situation?