How to get a guy's attention?

So, he's a little older than me and we've never talked.

But we do PE together cause there's just 1 gym. I don't know what to do. I'm way too shy to talk to him, but damn, I want to.

When some of my class were playing volleyball and some of his also were playing with us (including him) he was looking at me when he was laughing.

I don't know how to go and talk to him cause he's always with his friends, and I can't do it. Help, please

How to get a guy's attention?
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