Friendship starts as a tiny string and grows and grows until it's a bridge. Ideas are the first to drive over that bridge. Over that bridge of friendship we then see support, love, and help driving.
The bridge gets an upgrade- now it's a four lane bridge. Now we see time, energy, and emotions shared over that bridge.
Over that bridge we can sometimes see bad things driving over, such as hurt that needs help with. Sometimes it's meant to harm to receiving end. That's when the bridge should be demoted to a two lane bridge or destroyed altogether.
Friendship is a choice, as well as a subconscious connection. Thought, and feeling. Love, and pain. Help, and helped.