 There are six main types of loneliness. 1. Interpersonal loneliness. This is the result of losing a significant or intimate relationship. 2. Social loneliness. This is experienced when a person is on the fringes of a group, excluded from a group, or is actively rejected. 3. Cultural loneliness. A person who belongs to a different culture and feels like they don't fit or belong in the new culture experiences culture loneliness. 4. Intellectual loneliness. This is the result of feeling intellectually or educationally out of sync with peers, family, or a social group. 5. Psychological loneliness. This is felt by someone who has undergone a traumatic situation that separated them from the people around them. A situation others can't fully understand. 6. Existential or cosmic loneliness. This is an isolating loneliness experienced by a person who is facing death.