To me this song is a combination of spiralling depression because of a relationship gone bad/not happened in the first place and there is now drug taking and the contemplation of suicide because he's tired of life and the kicks in the teeth that come with it.
To me this song is a combination of spiralling depression because of a relationship gone bad/not happened in the first place and there is now drug taking and the contemplation of suicide because he's tired of life and the kicks in the teeth that come with it.