Supernatural- Destiel Fanfiction Alternate Ending

Ah, here it is- my first attempt at a type of Destiel fanfiction. This honestly was an assignment for my creative writing class, but I wrote a Destiel alternate ending type-thing, so it really isn't long at all. I may write a story based around this idea, but I'm not sure how exactly I would do it. So, here's a little taste of what it may be- please give me all the advice you can and tell me how you like it!