It does exist in rare form these days.
As a society, we tend to be more selfish and entranced within our own world. We tend to forget the beauty of loving others so much that we take a piece of us and give it someone else with no expectation in return. That is true friendship. I have it with one person who has been a role model for my life for 20 years. He is my best friend and someone I would give my life for to save his.