On the contrary to what everyone here has said.
I think that this song is speaking out to people who are feeling the thoughts of suicide. Notice how in the end of the music video, everyone stops what they were doing that would have killed themselves. It's basically telling people with those thoughts to think about there life one more time before taking it from themselves. When he's saying all those emo things, I think he's really just informing us on what those people are thinking, not what he's saying or thinking himself. I'm not emo in any way but I do get thoughts of if my life really does mean anything sometimes, then I end up in deep thought about how my life is better then what I think at that one, impulsive, insignificant moment. And this song reminds me of those moments and how I always seem to beat those short thoughts of unimportance.