"I would have told you so, but I worried you'd find something else to worry about instead, in that mental state, and your next choice might not have been something where I could tell you definitively afterwards to stop being silly, or refuted it by simple deed."

"I would have told you so, but I worried you'd find something else to fret about instead, in that mental state.  Your next choice might not have been something where I could tell you definitively afterwards to stop being silly, or refuted it by simple deed.  It is better to be able to clearly dismiss something your mind circles around, like that, for so long and under that much stress."