Friendship is one of the beautiful thing in the universe one can ever have. Sometimes your friends might make mistakes, sometimes those mistakes cannot be forgiven. But it can be corrected, you might be the one to guide them. But remember never leave them, because you will have no idea , how empty one can become after that. That emptiness if not filled will eventually turn into darkness. Once it has happened, it will be too late to stop it. Regret is only thing one can have after that. I'm one of the examples.