I feel for ya. Don't get me wrong it is normal to feel bad when a friend, or loved one hurts himself. Specially when they're trying to help.

But they chose to help, and they hurt themselves... How could it be your fault, you didn't make the desk hurt him did you?

His foot should heal eventually right, I mean the universe is choosing a small way to ruin your happiness. Its only a broken foot, could've been a worse accident. I would hardly call a papercut in the grand scheme of things the universe conspiring against me.

Well hoping for a speedy recovery and better luck. As long you have each other everything should be fine don't sweat the small stuff.