Do We Have To Repent For Every Minor Sin Ever Committed?
I am a student myself. Based on my understanding, we should repent for everything small or large and avoid repeating the same mistakes. We should also repent for mistakes that we may not be aware of. It doesn’t take lot of effort or it doesn’t cost money to repent, but Allah is very forgiving. So why not? Keep in mind that Allah may not forgive our sins against our fellow humans. We need to ask the victims for forgiveness and correct the wrong that we may have committed. The sin you are talking about seems to be a minor sin, but why not repent. Also, let your friend to do the same.