Comments (and silent rebuttals):

"Don't worry, it may never happen" (what do you think I'm depressed about!?)
"Life isn't fair, you know!" (yes, we all noticed that by now, thanks so much.)
"What is there to be upset about?" (I'd give you a list - however, I lack the energy.)
"It could be worse" (yes I know, but somehow that thought is not very inspiring at the moment)
"Blah blah blah ..." (I am aware you are attempting to help, but you are not a therapist. Fortunately.)