Urgent: What do I do about this guy?

Hi, I have this guy I like at school (I'm a Junior, He's a Senior), he's very quiet and only opens up to his friends. I've only introduced myself to him at the beginning of the year and haven't said anything to him since. I often catch myself glancing at him. Every time I walk by him or he hears my voice, I see him look up from his phone or glance at me. Maybe I'm overthinking it because it's a wish? what do you guys think? I'm honestly too scared to talk to him..

Urgent: What do I do about this guy?
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