The Collaborative International Dictionary of English v.0.48:
standoffish \stand*off"ish\, stand-offish \stand-off"ish\a. Shy or distant in manner; cold; aloof; reserved; not friendly. Syn: offish. [PJC] -- stand*off"ish*ness, n. -- stand*off"ish*ly, adv. [PJC]WordNet (r) 3.0 (2006):
standoffishness n 1: a disposition to be distant and unsympathetic in manner [syn: aloofness, remoteness, standoffishness, withdrawnness]