Under its blunt title, this is a poem about grief mixed with guilt. The speaker is addressing Helen, someone who has gone and not returned. At first the speaker sounds understanding: "I understand," "I know you wanted to go." The poem suggests Helen left for something she believed in, perhaps an act of kindness, though the text never says exactly what or where. The speaker seems to accept her choice.
But the calm doesn't last. The speaker admits to wishing for a goodbye, and the silence they kept still makes their "blood boil," a phrase that fits the title in the poem's subtitle. That anger seems aimed as much at themselves as at Helen. The ending is the most raw part: "I wish I had the chance to take your place." It's a quiet, painful line.
The mood is sad, restless and unfinished. The broken punctuation and short, halting sentences make it feel like someone speaking through tears, unable to tidy their feelings.