Great analogy, thanks for sharing. Friendships can change throughout our lives - up to date as well as how hard we work to maintain those friendships. Some friends we grow apart from or otherwise drift apart from, others are meant to stay in our life longer. I think the lesson is to cherish the important and deep friendships you do have, cultivate on maintaining those that you prioritize, and learn to let friendships that you’ve outgrown or where you no longer align or connect fade away, as they do.