No classes or mutual friends with my crush how can I talk to him?

So I go to a really big school and met this guy in the snack line at a football game and he was really cute and funny but neither of us really said anything in the hall the week after. I would follow him on Instagram but like I said our school is so big I’m not sure it’s him since it’s just his first name. We have no classes together or mutual friends and he’s a grade above me. How can I talk to him?

No classes or mutual friends with my crush how can I talk to him?
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