unsociable

not inclined to society or companionship; "an unsociable nature...shy and reserved"; "generally unsociable except with intimate friends"; "unsociable behavior"; "an unsociable neighborhood"

• antisocial — shunning contact with others; just shy"
• ungregarious — not disposed to seek company

• sociability, sociableness — the relative tendency or disposition to be sociable or associate with one's fellows