A Promise Not Kept

A simple promise.. not kept.

I kept a promise in a box, and swore I'd never break the lock,
But I wanted a peek at the prize so I slammed the box not once but twice
The box I rattled, the lock stood strong, but then you had to come along...

I was willing to simply let it be, the box stood strong, stood strong for me
But you were just too set in your ways, you jumped on the box and I saw it frayed
My box was broke but I held it tight like a vacuum was reaching into my mind
But then I finally said those words
The box disappeared, and the promise was broke.