A letter that opens with "Dear" promises warmth, and that is the trap this poem sets. Every stanza begins by addressing a "monster" in the polite, intimate language of correspondence, as if the speaker were writing to a distant relative rather than to something that drips black onto them. The clash between the affectionate form and the frightening addressee drives the whole piece. It leads to a central idea more uncomfortable than simple fear: the speaker is worn down by the monster and bound to it at the same time.
The first stanza is about lost time. "I wonder when you came, / I wonder when you'll leave" is a matched pair of lines, but the speaker can answer neither, because "Seems like years or minutes, / I cant quite tell." The fragment that follows, "Times. A blur with you around," is clipped and slightly broken, as though the thought itself has smeared. Whatever the monster is, it has taken away the speaker's sense of a clear before and after. Notice, too, that the speaker only wonders when the monster might leave. They don't demand it.
In the second stanza the monster becomes a substance. "Leaking, dripping black down on me" suggests oil, ink or something spilled from above, with the speaker underneath, passive. Then the stain moves inward: "In my brain it all collects." "Collects" is a quiet, almost clerical verb that suits slow accumulation, drop by drop, until nothing more fits. "Be" and "me" form the closest the poem comes to a tidy rhyme, and "collects" and "next" echo each other more loosely. It is as if the sounds are sticking together just when the monster is most physically present. The question "what will we do next?" slips in a small word with big consequences: "we." The speaker has already folded the monster into their plans.
Then the monster speaks. "Be mine you say, / Together forever as long as your hair" sounds like a childish promise, with forever measured against something as odd and finite as the length of hair. It is romantic and possessive at once. The speaker's reply is the most urgent line in the poem: "But you cant see I'm running out of time." Next the monster acquires a body: "Fists strong, eyes blue yet body small." Suddenly it has the features of a person, and a violent one, yet the leaking black and the crowded brain point to something inside the speaker. The poem never settles the matter, and that is a strength. It can be read as a harmful relationship, as a dark state of mind, or as both laid over each other. "Are you blind?" stings because the monster does have eyes, blue ones, and still doesn't see. The grammar of that line is slippery too, since "body small" could describe the monster or the speaker.
The shape of the poem backs up its theme. If we treat the opening "Dear monster," as a greeting, the stanzas shrink: five lines, then four, three, two, and finally one. It reads like a countdown, which suits a speaker who is "running out of time." By the end only a single line is left, and it is not what we expect: "Dear monster what would I do without you." With no question mark, it can be heard as a real question or a flat admission. The poem began by wondering when the monster would leave and ends by dreading the answer.
That reversal is what gives the poem its weight. It doesn't tell a story of defeating a monster. It describes the more confusing thing that happens when the worst presence in someone's life has also become the most familiar one. The loose, mostly unrhymed rhythm and the missing apostrophe in "cant" add to the sense of a letter written fast and never tidied up. That rawness makes the final line feel less like a performance and more like a confession.