Two short stanzas hold a tangle of feelings that the speaker can't sort out. The opening line sets up a strange loop: the speaker hates someone, and then hates the fact that they hate them. That second layer of frustration suggests the anger isn't what the speaker really wants to feel. Saying "I can't change that" makes it sound like the feeling has taken over, and the speaker is just stuck with it.
The second stanza moves from anger to something softer. Missing the person hurts, but the poem says admitting love hurts even more. That's the heart of it. Hate looks like a shield here, a safer feeling than love, which would mean being vulnerable. The title, "Reversible Emotions," fits this idea: hate and love seem to sit very close together and can flip over into each other. The mood is raw, conflicted, and quietly sad, and the plain, blunt wording makes the confession feel honest.