Most Helpful Guy
Well if he is always looking at you or if he is always trying to do stuff for you. and to awnser your update just ask him if he want to go out but if you are shy then hint at that you have no boyfriend or that you would love to go to a place with someone
Most Helpful Girl
I'd advise that a person doesn't go for a coworker, that makes work complicated... But good luck if you decide to go for it!