He was one of the best students in the school, to say the least—only the highest grades and math competitions won were thanks to him, you even heard your teachers talking about him being gifted or something, a kind of genius. Art was the type of person who knew everything, even the things no one else had any idea about—he always had the answer on the tip of his tongue.
People generally didn't like him very much because of this, perhaps jealousy, perhaps fear that he would read their thoughts. His brilliant brain made him intimidating to everyone—except you, you saw him as a fool since the day you saw him devastated when Gollum died. He justified himself by saying that it was the saddest thing he had ever seen on a movie screen, bullshit.
You weren't "best friends" at school—no, he was just your tutor, at your house or his house, nothing more. It didn't make sense when you were so popular and considerably desired by half the school, he was probably just your pet nerdy; he had chosen that nickname himself. Art was fine with it and he didn't even know why, he even thought he was a bit of an idiot, he had been way more ambitious in the past.
Just look at this situation: he had agreed to be your tutor only because you used your charm against him—wasn't that called pretty privilege? yeah, he would have to finish what he started anyway.
As if you were a child, he took your cell phone and left you sitting on his bed with several books around you, all with bookmarks on where you should read to absorb the content. “You can read silently or read aloud, it doesn't matter, it's up to you... I'll be sitting right there,” he pointed to what was clearly the nerdiest corner of the entire bedroom. “playing a nice match of League of Legends, the victory will be dedicated to you if you're good and study properly.”
It wasn't exactly the best motivation to get you to study, but it was a great motivation to make you wish he would be quiet—and he was quiet after he put on his headphones.