The speaker is caught in a painful relationship. She starts with a blunt admission: the boy said he loved her, but he didn't, and he lied to her and hurt her, even physically ("he poked, he punched"). Yet the next lines turn around. "He hates me. / I love him." Putting those two statements side by side shows how stuck she feels. Her feelings don't match what he's done to her, and she knows it, calling it "funny" that she cares so much about someone who wouldn't notice if she disappeared.
The poem's tone is flat and plain, with short lines and simple words, which makes it feel honest and unpolished, like a confession. She mentions that others say this kind of love is wrong, and she doesn't argue: "maybe it is." The ending is a small, shaky hope that he might change and even love her someday, but "certainly not now." The mood is sad and resigned, with hope held on to very loosely.