Help with getting a guys attention?

So I'm in grade 10 and I like a guy that's in grade 12. There isn't a problem in my school with dating different ages so that's not the worry. My problem is that I can't seem to get his attention. I always walk by him in the hallways and make eye contact but he never seems to actually notice me. I've talked to him a few times but just as friends in a large group. Is there anyway that I can get his attention and possibly hint that I'm interested?
Help with getting a guys attention?
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