Sage's "untruths" is a short, tense poem about not believing someone who says they love the speaker more. The speaker's reaction is a quiet sigh, and the flat statement that follows, "i know it's not true," shows how tired and certain they are. There's no argument here, just weary disbelief.
The second half hints at why. The speaker imagines what would happen if they stopped caring about perfection and made more money than "y o u." The odd spacing in that last word, like the gaps in "me more" earlier, makes the "you" feel stretched out or pointed at. The poem suggests that the other person's love may depend on the speaker staying beneath them, or staying flawless. The unfinished question, ending in a full stop rather than a question mark, leaves the answer hanging as a threat. The mood is guarded, wary and a little bitter, with the speaker doubting whether this love could survive their success or their imperfection.