Not Another Happy Ending

I wrote this myself for school and hope you guys enjoy it. I left it as an open ending so you could all theorize on what happened. I don't think I had any inspiration, but I don't wanna steal anyone's idea. So, if you find anything that might be similar to this, just tell me in the comments. This is my first short story I've written, so please tell me if you have any criticisms. I'll try to post as quickly as I can.