On Friendship

Rav Hutner says that the word rei'ah/friend is related to the word teruah - the broken sounds of the shofar.  a friend sometimes breaks you down, if he/she is a true friend. This is why the command to love our friends is followed by the prohibition of getting back at a friend.  Sometimes a true friend will critique us and our temptation may be to get angry at them when the appropriate response is thank you.