If آپ really want someone to notice you, walk up to him and talk to him, like you're just interested in meeting him, we have no problems in meeting anyone new. If we like someone as a friend, we keep talking to them, if not, we don't. If he doesn't like you, there's nothing آپ can do about it... But it's much better to know for sure than just sit back and be another person in the crowd! Hope this helps!