Definitely about suicide. The first line is a justification of sorts for it; a month of Mondays would be a horribly banal month. The repetitions of "carbon monoxide" later on, and the references to a tube in the window, lead me to believe he literally asphyxiated his fears in his apartment, or something to that effect. He was apparently a self-medicating drunk, and the "rock to let off tension" might very well be a drug reference; if not, that line escapes me.
Definitely about suicide. The first line is a justification of sorts for it; a month of Mondays would be a horribly banal month. The repetitions of "carbon monoxide" later on, and the references to a tube in the window, lead me to believe he literally asphyxiated his fears in his apartment, or something to that effect. He was apparently a self-medicating drunk, and the "rock to let off tension" might very well be a drug reference; if not, that line escapes me.