fallenstar - I recently wrestled with the very same thing - first I was going to lie. Then I was going to tell him I had failed, if he asked. Then I was going to just wait a few days.
Guess who drove herself completely crazy? Me! So I told him, got it over with, we talked about it (yes, punishment is coming when we see each other next) and it's over. As long as I held onto it, I was miserable. Because I was withholding trust, you see? And when I withhold trust, I'm not really surrendering to him. And that felt really yucky.
And yet, I still struggle with trust.
jeanne