I found a lovely drawing in Spense’s school bag; a girl and boy holding hands with hearts all around them. “This is so sweet, Spense. Who is it from?” “Oh, I don’t want that any more.” “Why?” “Because it’s from Ellie. And I breaked up with her.” “Why did you break up with her?” “Because Sam is back. And he’s my best friend.” Sam had been out of town for a while. “So you can’t have a best friend and…