1. He pays attention to you. He may not always be obvious about it, but if he's interested in you, he'll make sure to pay attention when you're talking, and he'll remember what you say.
2. He tries to be near you. He might sit near you in class or lunch, or he might find other ways to be around you.
3. He makes eye contact with you. When he's talking to you, he'll make sure to look you in the eye.
4. He smiles at you. If he likes you, he'll smile at you often, and he'll probably blush when you catch him doing it.
5. He's nervous around you. Shy boys might act nervous or awkward when they're around someone they like. He might fidget or stutter when he's talking to you, or he might avoid eye contact altogether.
6. He compliments you. If he likes you, he'll probably compliment you on your appearance, your intelligence, or your personality.
7. He asks you for advice. If he trusts you and values your opinion, he might ask you for advice on things like what to wear or what to do in a certain situation.
8. He remembers things you've said. He may remember details about your life or interests, and he'll bring them up in conversation to show that he's been paying attention to you.
9. He does nice things for you. He may go out of his way to do things for you, like holding the door open or carrying your books.
10. He tries to make you laugh. He might tell you jokes or do silly things to try to get you to smile.
Keep in mind that these are just some possible signs that a shy middle school boy might like you. If you're interested in him, it's important to talk to him and get to know him better to find out for sure how he feels.