"She's Always A Woman"... especially if you've been in a relationship with someone who wasn't all that great to you, but you can't help but love them anyways.
Taken by themselves, "Stop in Nevada" and "If I Only Had the Words" are pretty depressing in their own right - the first is an elegaic song about a woman finally escaping her loveless marriage and terrible life for California, stopping in Nevada, but the song's melody implies that this, too, will be a mistake for her; the second is another slow song about how a man cannot explain everything he wants to towards the woman he loves, and can only offer physical comfort to her. However, the two songs are placed chronologically next to each other on the Piano Man album. Together, they can be seen as counterpoints to each other, and become about a billion times more depressing.
The sheer depression of "Allentown". Dead end jobs, dead end lives, and the slow decay of everything in the town from the factories to the people. And as if that weren't bad enough, the song ends with the narrator either dying or killing himself.
Well, we're living here in Allentown And it's hard to keep a good man down But I won't be getting up today
From "Innocent Man", seeing someone pull away and into themselves, not because of anything you've done, but because they can't find the strength to trust again. And knowing you can't fix it because they won't let you.
I know you're only protecting yourself I know you're thinking of somebody else someone who hurt you... I'm only willing to hear you cry because I am an innocent man.