extremely busy with and interested (in an activity, book etc)

preoccupied; attentive to

to be very attracted to a person; to enjoy something very much

addicted

(of looks) eager; earnest; (of a person) having, showing, serious and constant desire or attention

determined, resolute

unaware, having no memory, (of something)

unaware, ignorant

seriously thoughtful

meditative, solemn