The speaker is watching themselves fade and can't decide why. The poem opens with a question they keep returning to ("I often ask myself"), which suggests this doubt isn't new but something that nags at them. Two explanations compete. One is natural and nobody's fault: they are simply past their prime, and decline is part of life. The other points a finger at someone else: "you" withheld the one thing the speaker needed to survive.
The poem never says what that thing is, and that gap matters. It could be love, attention, or tenderness, and leaving it unnamed lets readers fill in their own. The plant-like image of wilting makes the need feel basic, like water or light.
The mood is quiet and sorrowful, with a thread of hurt. The line about begging "countless times" is the most painful, because it shows the speaker asked openly and still went without. The lack of capital letters and the plain phrasing make the confession feel small, tired, and honest.