Will a guy stare at you if he knows you like him but he doesn't necessarily like you?

Staring isn't necessarily a good thing. It is one thing to stare at, say, a painting in a museum or, say, a train wreck; it's quite another to stare at a person. Was he looking at you, or was he ogling you? Was he leering or smiling? It matters. Perhaps he was checking you out and deciding whether he wanted to make a move on you. Perhaps he wasn't staring but merely looking in your direction and trying to get a reaction from you. When a guy you are interested in looks at you, the simplest thing you can do to send him a positive message is to smile. Girls really underestimate the power and beauty of a smile. For many guys, it's a major turn-on.