Summarize this article in one sentence.
Keep it to casual glances, or he might get freaked out. When he catches your eye, smile sweetly and turn back to what you were doing. If you sit and stare at him all day, he'll think you're a little obsessive. When you do talk to him, though, be confident enough to look him right in the eye instead of staring at the ground, and he'll be impressed by how you handle yourself. Change for a dollar. Or ask what time it is, like if you might be late to a class or whatnot. Ask if he knows any of the people running for student office. Something simple, no big deal. If you're talking to him, it's okay to avert your gaze every once in a while. Staring into his eyes during the entire conversation may be a little intense. This does not mean you should ruthlessly flirt with his friends until they can't help but notice you. It does mean that you should act cool and fun around his friends, and try to get to know them a bit. Flirting a little bit with other guys is okay and will keep your crush on his toes, but if you go overboard, the guys may get the wrong impression of you. Instead, be kind and interested, ask his friends about their favorite sports teams or weekend plans, and just try to act cool without making it obvious that you really like their friend.  If his friends notice you and like you, then they may talk about you in front of the guy, which will make him notice you more. If you become friends with his friends, they may even invite you out to parties, which will make it more likely for you to hang out with the guy. Resist the urge to send friends to ask if he likes you. He will think that you're trying to force a relationship. This will get right back to him and he will not think it's cool. Even asking the friends about how he's doing or what he's up to will basically reveal that you have a crush on the guy. If the guy is in your orbit but not talking to you, don't spend your time looking sad or bored and waiting for him to come up to you. Instead, enjoy the people you're hanging out with, laugh, tell funny stories, be engaged instead of looking around you, and just be a person who other people want to hang out with. Make him want to come up to you and make conversation because other people enjoy your presence.  If you look like you're in high demand and surrounded by people, he won't be scared off; instead, he'll just want to get to know you even more. Guys love girls who are fun to be around. Let him see you cracking up instead of listlessly searching for something fun to do on your phone. If you are talking to the guy, as corny as it sounds, the best thing you can do is be yourself. After all, you want him to like you, don't you, instead of some vision of what you think the perfect person should be? You don't have to let him know everything about you at once, but you should generally act the way you do around your friends, just a bit less familiar. You may be feeling shy, at first, but the more you talk to the guy, the more comfortable you'll be being yourself. You may think that guys like dumb girly girls who just giggle and toss their hair back, or girls that just fawn all over them, but that's not the case. Guys are much more attracted to independent women who can be themselves and are comfortable enough with who they are that they don't have to fake it. You may think that gossiping or saying horrible things about the people you both know will make the guy think you're an interesting person to be around, but really, while he may be temporarily interested by any gossip you may hear, he'll think you're a person who is petty and who can't be trusted. No guy wants to be around a girl who is always talking trash, because that will make her look like she's in the center of the drama, and no guy wants to be within a ten-mile radius of drama, especially girl drama. Keep things positive instead. You want the guy to have a fun and pleasant experience whenever he talks to you, instead of feeling your negative energy. This is the worst thing you can do as a girl if you want to catch a guy's eye. If you see him hanging out with other girls, don't ask him if he likes them or talk about how those girls are stupid or ugly or fat. This will just make you look ridiculously insecure and extremely jealous. If you seem like a jealous person before you even start dating the guy, then he'll already begin to imagine that you would be an incredibly jealous girlfriend. If a girl that you both know comes up, wow the guy by complimenting the girl instead. He'll see that you're so cool with yourself that you don't feel the need to compete with other women. Let's face it: guys love to talk about themselves. Who doesn't, really? If you want the guy to enjoy hanging out with you, then you have to make him see that you care about him without fawning all over him or awkwardly squeezing his biceps. Instead, ask him about his favorite sports teams, or about the sports he plays if he's on a school team. Talk about his favorite bands, his favorite TV shows, or even his favorite type of Mexican food. You can share stuff about yourself too, of course; don't make him feel like he's being interrogated, just like you want to get to know him. Some guys are shy and actually don't like talking about themselves so much. If you get this vibe, then switch the subject to something you can both generally talk about, like your plans for the weekend.

Summary:
Make eye contact. Ask him for change. Make his friends notice you. Let him see you having a great time. Don't act like someone you're not. Avoid trash talking. Don't be jealous. Ask him about his interests.