When you're around, he acts differently. A boy will never do something like that unless he likes you. If a guy is interested in you, he will strive to appear calm in front of you. When you're around, he could try to be quieter or colder. He might even pretend to be looking at you but be looking at the girls walking by. A guy will also probably laugh at your jokes more than usual. You'll see that he's having fun when you have a good time together. He wants you to like him so he tries hard to make you happy. Last but not least, if he likes you, he will definitely pay attention to you. He will watch you talk with other people as well as listen to what you have to say. Have him write you a poem or draw you a picture. If he is really into you, he will want to show it! Give him time to get over his shyness. It may take some time before he feels comfortable enough to tell you how he feels. Relationships are about feeling things out first before jumping into anything serious. If he isn't sure about you yet, he will let you know.