That was then, This is now.
I believe that friends will stick together through thin and think. As friends grow up, they won't hang out as much but surely they will still talk. S.E. Hinton believes opposite. She believes that growing up means growing apart from friends.
I feel that the most memorable people in life will be the friends who loved when you weren't very lovable. For example, S.E. Hinton felt that friends were like a family member you never had.