Back in the 80s my brother was what he called a "mod". Basically, he wore his pants not extremely tight, but he rolled the ankles to make them look a bit tighter. He wore black, long t-shirts (usually with some sort of depressing band like The Smiths or Cure), moped about and talked about how the world was going to hell in a handcart and he was in the first row.
When grunge hit the UK in the 90s, he changed his clothes, got a bit more pissy, but still complained of having a front row seat on the Oblivion Express. He grew out of it, but for awhile he used the music and fashion of the day to express his discontent with the world and himself.
I don't know but a bit about "emo", but it has the same amout of letters as "mod" and sounds just as depressing.
Anyone feeling bad about his or her life has every right in the world to be as melancholy as they'd like, but please remember this:
The sun WILL rise tomorrow.
You WILL eventually see the light at the end of the tunnel
and the Oblivion Express WILL stop eventually if you give it a chance. Just bloody well hang in there. :)