Tell him thanks but you already have help, still angry at him.
You tell Darien "Thank-you, but I've already got help." So he goes off and you and Sabastian go to your house he leaves you at the front door saying, "Maybe I'll see you around sometime." You go in and head up to your room. Luna is asleep on your bed and you don't want to wake her up so you decide that the best thing to do so you make the least amound of noise is to go to sleep your self.
This is one of the seven endings for this story. It's not a really bad ending, but it's not one of the best either, so you did okay.