The article presents a theoretical overview of the understanding of the multilevel nature of the subject, the multiplicity of its specific manifestations is noted, the emphasis is placed on the analysis of the personality as the subject of the experience of loneliness. The results of the empirical study allowed us to establish the following: diffuse experience of loneliness is caused by the action of identification mechanisms; alienating loneliness is associated precisely with the process of isolation of the individual from society; dissociated loneliness is associated with distorted ideas about one's own subjectivity and is characteristic of people with an expressive psyche; a higher level of subjective experience of loneliness is accompanied by an intense experience of fear of responsibility; the specificity of social fears is largely the degree depends on the system of value orientations inherent in the individual; the level of subjective experience of loneliness and the presence of social fears are largely determined by the social situation of development and demographic characteristics.