Told in the voice of a wife who has kept silent for a long time, the poem moves from patient endurance to a cold, final break. She opens with a question that sounds almost sarcastic: am I not just the perfect wife? The word "perfect" seems to mean someone who sat in a corner, said nothing, and "drank up" her sorrow while her partner played games with her feelings.
The apology, "I'm sorry my love," is hard to read with certainty. It could be tender, guilty, or bitterly ironic. Then the tone hardens. She says she grew tired of the games, and then tired of him himself, which suggests love has worn down into exhaustion.
The last line, "Rest in peace my beloved," is the shock. Judging by the title and tone, it could mean the relationship has died, or something darker. The mood is quiet, bleak, and chilling, because the speaker stays so calm.