Nikky's poem is about a heartbreak that feels painfully familiar. The speaker is crying again, and she knows the feeling well. Twice she says she has been here before, first with tears and then with the ache in her soul. That repetition makes the pain seem like a cycle she can't escape, not a one-time hurt.
The turn comes in the last lines. Only last night she "could have sworn" this guy was the right one, so hope was real, and it didn't last. Now she is doubtful, and she admits it's "just like once before." The trailing dots throughout, in the title and at the ends of lines, make the voice sound hesitant and worn out, as if she's trailing off mid-thought.
The mood is quiet, sad, and a little resigned. There's no anger, only the disappointment of realizing she may be repeating an old pattern. The title calls tears "the return no one wanted," which sums it up well.