Who is Kevin’s best friend? Who are Kevin’s friends, period? Ha! We see how well his friendship with Jean turned out, yeah? Friendship is something Kevin is still learning ((something he doesn’t see a point of learning, tbh, what a time suck, what a distraction!!)), and it’s going to take him a while to figure it out. He can’t be friends with people who aren’t into Exy, but if they’re bad at Exy or don’t try to his standards, he’s too annoyed with them to tolerate them for long. So that needy, competitive, high-handed streak does more for making him enemies than friends.
But he’s not beyond saving. Andrew & Neil could be his friends, technically, especially after Andrew & Kevin stop fighting over Exy all the time. Neil & Kevin squabble more often now that Neil’s stolen his game & style back from Kevin, but they’re still intensely obsessed with each other’s talent and potential and they’ll never walk away from each other.
Kevin & Thea get much closer once the Moriyamas stop intervening with their flirting. Kevin & Jeremy stay in touch once Jean moves to the Trojans and will eventually become proper friends instead of just mutually adoring rivals. Kevin likes his professional team, for the most part, but he’s more likely to be “friends” with the best of the US Court.
And then one day, when Kevin’s finally grown up a bit, he and Thea will befriend some people at the dog park who not only don’t play Exy but who cheer for all the wrong teams and that is when Kevin will finally be a functional and mature adult.