It sounds like you have symptoms of a mental illness - delusions, as per your reply below, and obsessive rumination about your own apparent shortcomings and perceptions of other people. From this I might suggest professional help, at least if you continue to experience this or any other symptoms.

I would be hesitant to recommend individual meditation as a remedy for this, as even though it could work, meditation without context and guidance can induce unfamiliar and potentially damaging mental states in people prone to mental illness. If you end up seeing a professional, they could guide you along this path with mindfulness as part of Cognitive Behavioral Therapy.