Eternity Isn't Eternal

You end up becoming immortal at the ripe age of twenty-eight. After 200 years of living on your own and ignoring your body's wishes of being healthy, a knock comes to your door. Your house didn't have the best history so persistent knocking was strange, and so was the person behind the door. Even stranger? You couldn't seem to keep them away.

This book is kind of a work in progress, I'm still not sure if this is going to be a short-story or not, all I know is that hopefully it's fun.
Another thing to note, there will be no romance coming for the main character. A.K.A you
(The story idea came from a Pinterest post, everything else is all mine baby.)