Friendship.

It's not that easy to be friends at all.
In childhood, everything seems much easier. Friends change very often. And in each you see a friend for life. And I'm ready to do anything for my friend.
But some time passes and you get to know new people. And old friends no longer seem so cute to you. And you find in them some kind of disadvantages, sometimes more than advantages. And you get used to the idea that rotating friends is not so bad.
Over the years, you realize that as a child you have a great need to communicate, but very little choice. The need to communicate over the years passes, the choice increases. But there are no more friends.
Do you remember your first girlfriend?