Examines to what extent peer relations, self-confidence, and school performance correlate with self-rated happiness and loneliness in adolescents. Personality traits, self-confidence, friendship, and school grades were all significantly oppositely correlated with happiness and loneliness. Regressional analysis revealed that extraversion and neuroticism were direct predictors of happiness and self-confidence, while psychoticism and extraversion were direct predictors of loneliness. (Contains 50 references and 2 tables.) (GCP)