What does it mean when a guy stares at you everytime he sees you?

Every time I see this guy he's always staring at me from across the room, he's tries to make eye contact with me and hold it. By the way, when we're staring at each other, I'm always the first one to look away. It feels likes I'm the only one he sees in a crowded room. He doesn't look anywhere else, just into my eyes and he has this blank look on his face but sometimes he smiles. When he's with his friends they'll all stop talking and look at me. They know I like him. Why does he do this? Is he interested? When I asked a psychic about him she said he had no passion for me.