Charmed Life

is it important for you to tell someone their mistake they had done so that they can change for the better? is it important to let them know that you're unhappy because of what they had done so that they can think of it and try to make it up or do something about it? is it better to not tell and just ignore it and let the matter be always in your heart unsolved? is it better for them to guess and think of every possibilities about what they had done wrong that cause the unhappiness? doesn't all the guessing and thnking happening everytime make you feel tierd? its very tiring, really. very tiring..