Not everyone can have expensive as true FRIENDSHIP, it was a mutual affection between the people based on the understanding between each other, it was a strong form of bond and gives you the great support for each and every step in your life.
when a whole world is discouraging and every other person in the world are trying you to push down from the above, REMEMBER in that hard time there will be one true bond of friendship that will support you to climb high and even higher in your life and that's what I called as EXPENSIVE of all.