Article in English: 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...

Summary in Indonesian:
Lakukan kontak mata. Tanyakan padanya apakah dia punya uang receh. Tarik perhatian teman-temannya. Tunjukkan padanya bahwa Anda menikmati saat-saat yang menyenangkan. Jadilah diri sendiri. Hindari berkata buruk. Jangan cemburu. Tanyakan padanya apa saja yang dia sukai.