You were a demon he was a fallen angel somewhat alike yet realities so far apart it was hard to hold onto him. No matter how much you wanted him to stay he would always leave some way or another. So when he does come back you cherish every moment of it. You even get to discover different universes where different things cause him to either leave or stay. With all of this would you still choose the reality of him leaving constantly and being left heartbroken? Or would you like to go back to the very first day you met and try to change everything that ever happened hoping he would love you the same.