If you want inspiration from songs....
Listen to this
It's Losing my Religion by R.E.M.
And it's so unlike them
It just feels like a sad song.
I swear every time I hear it I feel disappointed in my self.
This is definitely I great song to listen to if you need to write a sad or depressed part of a story.
You should check out more of R.E.M. too because they are just awesome in general. (Technically it would be they were awesome since they broke up in 2003 ;-; )