The speaker is furious with someone close, and the poem follows that anger as it cools into withdrawal. It opens with a tired, sarcastic "I'm sooo done," and the short refrain lines, "Expressions flattening," "Walls building," suggest someone shutting down their face and feelings to protect themselves. The repeated "for You" and "Always for You" hint that the speaker has given a lot, and that being insulted in return is a pattern, not a one-off ("your usual way").
The middle stanza is the loudest. The speaker bursts out with a bitter question, then answers it flatly: "I see. That's the way it is, then. No more words." The drop from shouting to quiet is the turning point.
By the end, the pairing "You. Me." repeats like two people pulling apart. "Safety breaking. Without You." leaves it unclear whether the speaker feels unsafe now that the bond is cracking, or feels the loss even while choosing to leave. The mood is tense, hurt, and sad underneath the anger.