Sports teaches you to understand the meaning of a team. You need to be able to work with everybody; you don't have to be their best friend. You can experience the fun of competition and driving toward a common goal without pushing to bond in some major way with each individual on a project.
The bond that links your true family is not one of blood, but of respect and joy in each other's life.
The strong bond of friendship is not always a balanced equation; friendship is not always about giving and taking in equal shares. Instead, friendship is grounded in a feeling that you know exactly who will be there for you when you need something, no matter what or when.