Meeka's poem is about overthinking, and the speaker treats it almost like a skill they never asked to have. They admit it happens even against their will, and they wonder if everyone is born with it, a kind of natural instinct. The thoughts that follow are painful and insecure, swinging from "do they really love me" to "why am I so unlucky."
The mood is heavy and a little weary. The speaker pictures their mind as a deep, dark cave, then second-guesses themselves and changes it to a tunnel with the entrance blocked by debris. That small correction is itself a bit of overthinking, which makes the point neatly. The last two lines shift the tone. The speaker mourns missed "golden opportunities" and blames someone else, then honestly admits that they are partly at fault too. It ends on a quiet, self-aware note rather than a solution.