Prologue Do you have a friend that makes you smile on the darkest of days? I do! I have my best friend, Ellie. If you are lucky enough to have a best friend, what would you do for them? Would you stand up for them? Fight the last person on Earth for them? Die for them, or give them your kidney? Said yes so far? Surely your love for your friend is wonderful… but what if I asked: Would you be willing to live through heartbreaks over a thousand lifetimes, just to be with your friend together until the last breath? Would you only do it for your best friend,…