Three short lines, and almost nothing else on the page. The speaker asks a question that is really a quiet challenge: if you could see me, not just glance at me but look properly, would you notice the gap between who I am and who I appear to be? The poem never says what that "disparity" is, and that's part of what makes it unsettling. It could be a difference between the speaker's inner life and their outer face, or between how others treat them and how they feel they deserve to be treated. The poem leaves that open, so readers can fill it with their own experience.
The speaker sounds lonely and a little guarded. The pause after "Really see me" feels like a held breath, and the word "disparity" is oddly formal, as if the speaker is stepping back to examine themselves from a distance. The mood is hushed and vulnerable, with a hint of doubt: the speaker isn't sure anyone is looking, or that anyone would understand what they found.