so I can't say if it may have been justified. I don't think you are insane, so you probably had good reason.
1)Have you ever done anything so crazy?? PLEASE, SOMEONE SAY YES!
Yeah, once. And I caught him doing something with another girl.
2)Do I have to tell him that I am insane? Or can this just be our little secret?
Don't tell him at this point. Maybe somewhere down the line. Unless something he did previously was the reason you felt compelled to do this...then you really need to let him know. But if it was something another guy did (which rereading your post it sounds like it) then don't tell him.
That's the true harbinger of spring, not crocuses or swallows returning to Capistrano, but the sound of a bat on the ball ~ Bill Veeck