Interestingly, I too have a best friend who really did save my life and while I may or may not die for her I would most certainly expose myself to enormous risk to keep her safe. The main difference though is that she spends time with me on occasion and we have great times chatting about this and that (sometimes the other), going on shopping trips etc; basically returning my friendship. In short, she has the decency to actually exist.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'