Hey Game Zeta! I'm glad you played through this!
The game is open to interpretation but you pretty much got the original story I had in mind. Your "wife" isn't the same person as the girl you liked/wrote that letter to. Presumably, a lot of murder happened, considering the classroom and school was abandoned since 2001 (fun fact-- the date updates to stay current). But through the magic of blunt force trauma to the head, you've forgotten all of that.
Thanks again for making a video on my game! Was pretty cool to see :)