Dean Winchester x reader I love you until I'm gone

when a young 17-year-old dean Winchester is going out with a young 16-year-old (y/n) singer daughter of ellen and bobby, what happens when the most unannounced thing happens that changes the life of both dean and (y/n)? will they be able to get through the hard times that lie ahead?

(doesn't follow the series, this is all made up, i don't own supernatural I just own the plot)