What does it mean when a guy copies you?

I have a guy that I'm interested in at least half of my classes, no I notice what he does and what he wears. He's on of those kinds of guys who wears some jewelry. At the beginning of the school year, we both wore a lot of necklaces. Then I kind of downgraded to like two necklaces and then one dog tag. And then I noticed he only wore one dog tag as well. And now I have a lanyard and so I wear the dog tag and lanyard, and so does he now. Does that mean something? I also notice he looks at me a lot, and when I ask one of my friends a question he answers. Help please, thanks!
What does it mean when a guy copies you?
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