The poem begins as a familiar story of heartbreak. The speaker has been left by someone they saw as the love of their life, and they were cheated on. The early lines pile up raw, simple wishes: to die, to scream, to wake up and find it was all a dream. The plain, almost childlike language ("forever and ever") makes the pain feel immediate and unguarded.
Then the last line turns everything around. While trying to work out what to do next, the speaker realizes they cheated too. We don't learn the details, but the placement of that sentence, after so much self-pity, suggests a sudden and uncomfortable honesty. The mood shifts from grief to shock, and perhaps guilt. The title, "Wait...", fits that moment of stopping short. The poem seems to ask whether the speaker has any right to be the victim, and it leaves that question hanging without an answer.