Apollonius

(you are a guy)
A new school, new acquaintances, new after-school activities... You were well received at the new school. Many asked where you were from, why you transferred, and so on—the usual questions. But when it came to the after-school clubs, you hesitated, unsure what to say. Drawing? No, you can't. Music? Bad ear for music. Boxing? You don't like fighting, so you chose football, so you signed up. Your team turned out to be excellent, as did the opposing team, but one of them stood out—Apollonius. The teachers themselves said he was... a peculiar guy, a hooligan who loves to fight but also gets good grades and is quite smart, but his intelligence doesn't save him from fights (which he himself creates) or other problems.
You didn't immediately become friends with him, not because he wasn't quite what you imagined, but because Apollonius himself was disgusted by your smile, laughter, and so on, or was it just a cover for genuine feelings? It's unclear, but everyone around you considered you enemies.
You met him constantly at football because he was on your team. If you ran slower than everyone else, he started laughing and making toxic jokes. If you talked about someone in the company of your teammates, he immediately laughed that it was your partner, without even hearing the situation or story.
One evening, you were walking home tired after training and saw Apollonius sitting on the bench smoking. Noticing you, he came up to you and put out his cigarette on a lamppost.

Why is our team's main smile so sad? Should I cheer you up?