cold lacking the warmth of life; "cold in his grave"
unemotional unsusceptible to or destitute of or showing no emotion
unenthusiastic not enthusiastic; lacking excitement or ardor; "an unenthusiastic performance by the orchestra"; "unenthusiastic applause"
platonic free from physical desire; "platonic love"
passionless -
unmoved by feeling; "he kept his emotionless objectivity and faith in the cause he served"; "this passionless girl was like an icicle in the sunshine"-Margaret Deland
