(of a person) not able or willing to show feelings or take part (because nervous, arrogant etc)
remote
easily shocked; extremely (often too) moral
shy and strict in behavior
(of a person, character) slow to express feelings or opinions; (of a seat in a train, room in a hotel etc) kept for a person's later use
silent, unsociable; constrained
without companion; (preferring to be) alone; single; seldom visited
alone, single; unsociable
not communicative
shy, silent
not showing one's true affection, interest etc
cool
(of a person) unusually quiet and shy
unsociable