Summarize this article in one sentence.
Go right up to him and introduce yourself if he doesn’t know who you are yet.  Say: “Hi, I’m (your name),” then “And you are?” or “Who are you?” if you want to be a bit more playful and brazen. Repeat his name to help you remember it and let him know you are attentive: “Hey, Ryan, it’s really nice to meet you,” or “Oh, Sergio, I love that name!” You go to the same school so you have plenty in common to keep it from being awkward. You can break the ice by referencing how you’ve noticed him: “I see you walk past my gym class every day and I wanted to put a name to the face!” Start talking to him on Facebook or other social media. If you have the same lunch period, talk to him in line or, if you already know each other, sit at his table. If you have a class together, sit near him so you can talk easily or ask him a question about the subject. Get to know his friends so there might be an opportunity to hang out outside of school. Ask him questions and listen. If you don’t know each other very well yet, keep it simple with questions like “How was your day?” or “What do you like to do on the weekends?” Find out if he plays a sport, what kind of music he likes, what he likes to do in his free time.  You don’t have to interview him or blast him with questions, but make sure you’re not just talking about yourself, which is easy to do. Find ways to show him that you remember what he’s told you. Wish him luck on his game or ask him if he’s listened to his favorite band’s new album. Don’t pry into personal details like his religion or family dynamic too soon, keep it light and playful. Find out what you have in common and let the conversation develop naturally. If you’re struggling to start a conversation, try making a comment that ends in a question.  “I saw the basketball team got new uniforms, do you like them?” or “It looks like it’s gonna rain, doesn't it?”

Summary:
Talk to him. Find casual ways to be around him. Get to know him.