So i did some stupid things when i was younger. But i feel bad about one of them to this day.
Oh no, what did you do?
I stole 50 bucks from my brothers wallet. He was going to use it on a date. Girl never called him back.
Oh no!  Does he know you did it or did you never tell him?  Yeah, we all have things we regret, its how we move forward and resolve the situation that matters.