bosom, buddy-buddy, close, especial, familiar, friendly, inseparable, intimate, inward, near, thick, tight

clannish, close-knit, tight-knit

affable, boon, companionable, convivial, cordial, genial, gracious, hearty

gregarious, sociable, social

comfortable, cozy, easy, snug

amicable, neighborly

confidential, secretive

adoring, affectionate, dear, devoted, fond, loving, tender, tenderhearted, warm

aloof, antisocial, cold, cool, detached, distant, frosty, remote, reserved, standoffish, unfriendly, unsociable, withdrawn

amicable, bonhomous, buddy-buddy, collegial, companionable, comradely, cordial, friendly, genial, hail-fellow, hail-fellow-well-met, hearty, matey [chiefly British], neighborly, palsy, palsy-walsy [slang], warm, warmhearted

affable, agreeable, approachable, good-natured, good-tempered, gracious, nice, sweet

clubby, convivial, folksy, gregarious, hospitable, sociable, social

jolly, jovial, merry

extroverted (also extraverted), outgoing

brotherly, fraternal, sisterly

close, familiar, intimate

adoring, affectionate, devoted, fond, lovesome, loving, tender, tenderhearted

alienated, estranged

chilly, cold, cold-blooded, cool, frigid, frosty, glacial, icy, wintry (also wintery)

unsociable, unsocial

aggressive, argumentative, bellicose, belligerent, combative, contentious, disputatiousadjective