When Job's friends came to see him after his children had died they sat with him for seven days and nights without saying a word because they saw how grief stricken Job was. Sensitivity in the presence of grief should make us more silent, more ready to listen. See Job 2:11-13.
Jesus wept at the tomb of a friend, in the presence of the person's sisters. Tears it seems are a valid and helpful expression of feelings. See John 11:35. Our response to Grief should be simple and matched to the needs as we see it. Time heals grief; love prevents scar tissue from forming.