Stare
The look/gaze/glance
It is gaze
gaze
gaze.
"Gaze" can be both a verb and a noun. As a verb, it means to look steadily at something. As a noun, it refers to a steady or intent look.
look
he likes you and would probably like you to make a move.
gaze, observe, peek, watch, survey, inspect, glance, squint, glimpse, stare, look it up on an online thesaurus if in doubt :)
gaze
he probably likes you and gets nervous when you discover he's staring at you OR he was surprised to see you staring at HIM.
To fixx the eyes in a steady and earnest look; to look with eagerness or curiosity, as in admiration, astonishment, or with studious attention., To view with attention; to gaze on ., A fixed look; a look of eagerness, wonder, or admiration; a continued look of attention., The object gazed on.