(of a person) not able or willing to show feelings or take part (because nervous, arrogant etc)

remote

a person who is more interested in her or his own thoughts and feelings than in things outside; a quiet, antisocial person

person who retreats mentally

a person who hates people and avoids them

person who hates others

(of a person) self-conscious and uncomfortable in the presence of others; (of animals etc) easily frightened

quiet and self-conscious

one only; not married; for the use of; used for, done by, one person

alone, distinct

strange; outstanding; of a form of a noun, pronoun, used to refer to one person or thing

unique, odd

without a companion; performed without an accompaniment

alone