unobserving

apathetic bored careless distracted distraught indifferent oblivious

absent absentminded blind distrait diverted dreamy faraway heedless inadvertent inobservant listless lost musing neglectful off-guard out to lunch preoccupied rapt regardless remiss removed scatterbrained thoughtless unconscious undiscerning unheeding unmindful unnoticing unobservant unperceiving unthinking unwatchful vague

caring concerned interested mindful

attentive heedful looking noticing observant