The speaker opens with questions that sound more hurt than curious: Why does everyone leave? Did I do something wrong? Plans with a friend keep falling through, whether the "no" comes from the friend or from the friend's mom, and the promise of "next weekend" never seems to turn into anything. The short lines and bare "No." make the disappointment feel flat and tired, as if it has happened many times.
What stands out is the speaker's honesty about being alone. They say they like it, but the "but" changes everything. Sometimes they just need someone beside them as proof that they have a friend. From there the feeling slides into wanting to run away and be forgotten, even if it takes forever. The final "So. Goodbye." is quiet rather than dramatic, which makes it sadder. The mood is lonely, hopeless, and raw, and it reads like a message from someone who feels unseen. The title's single word carries a lot of weight.