Contrary to popular belief nerds are not necesarilly the honor roll, teacher pet students people think they are. No the Nerd subculture is made up of gamers, otaku, and fanboys.
These guys and girls don't go home and do homework and study. No, they spend all after school and all of their free time playing online multiplayer games, playing YugiOh, and watching anime and reading comic books. Kids who actually study and do homework are just smart. Most of them tend to be either overweight or underweight, they gorge on junk food, and whenever they're on Xbox Live or 4Chan they front and pretend to be badasses when in real life they'd get their asses handed to them from lack of exercise.
Don't be fooled you can be a gamer or manga lover without being a nerd it's just that nerds are obsessed with video games and anime/manga. Also for the real nerds when girls say they love nerdy guys, they're usually talking about hipsters who wear the whole nerd outfit of thick frame glasses and plaid shirts, not your pathetic asses.
Nerds spend almost all of their free time playing video games, playing trading card games, reading manga, or watching anime and cartoons and rarely ever socialize with anyone outside of the Internet.