I had some friends like this, though we drifted. It's more that they've changed so much that I can't be myself around them anymore.
I found one new friend who I got closer to than anyone. He understood me on a level even my own family didn't. Shared a house, came home everyday to game with him. One day I came home and he was just lying there dead. Seizure from genetic disease. They let me carry his picture during the funeral march. I cried as much as his family did.
Destroyed my world that I'll never find a friendship like that again. Still glad I had it, those 8 months are more precious to me than anything.