Why does he remember specific things about me and correct people if they get it wrong?

this guy that I really like was in a conversation with my friends. I wasn’t there at the time and I was in a different class. We do the swim team together and my friend was telling my 100 breastroke time to him (she told him the wrong time on purpose) and he responded with “it’s actually ——“ he remembered specifically what the time was and corrected her. For some more background info, he also tries to start random convos and he randomly gives me thumbs up and smiles. He gives me good eye contact whenever he talks to me. He also said to me “good luck, just have fun, you got this!” Right before my race and he was cheering me on yelling my name. He compliments me every now and then saying I’m the best swimmer on the team, I’m a good breastroker, and etc. I’m desperate please help me with some explanation y'all

Why does he remember specific things about me and correct people if they get it wrong?
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