Yes, loneliness from overthinking is a real phenomenon. Overthinking can lead to feelings of isolation and disconnection from others, even when surrounded by people. When someone constantly overanalyzes situations, relationships, or their own thoughts and actions, it can create a sense of being misunderstood or disconnected from others. This can result in increased feelings of loneliness and a lack of social connection. Overthinking can also lead to self-doubt and a negative perception of oneself, further exacerbating feelings of loneliness.