The speaker is still in love with someone who has left and isn't coming back. The poem opens with a small, sharp twist: the speaker remembers every sweet thing this person said and did, but only because the other person has forgotten them. One side carries the memory for both, which makes the loss feel lopsided.
The speaker is honest about the situation. "You won't come back for me" is stated flatly, with no argument or pleading, and then comes the admission, "I still love you." The word "forever" is the hinge. The ex-partner said it once, and the speaker treats it as a promise that might still come true. That hope is what keeps the speaker going, but it also keeps them stuck waiting.
The mood is quiet, sad, and a little stubborn. The short lines and plain wording make it sound like a private confession, tender but aware of how unlikely the hope is.