Regret

Regret is like feeling sad or upset about something you did or didn't do in the past. It's like wishing you could go back in time and make a different choice. Maybe you ate too much candy and now your tummy hurts, or you didn't invite your best friend to your birthday party and now you wish you had. Regret can make you feel really bad inside, but it's important to learn from your mistakes and try to do better next time.