Why do my crush's friends stare at me?

So I like this girl and for some reason her friends look at me. During class my crush also looks at me but if I catch her she looks away. During class if I even turn my head they're all looking at me except my crush who will be looking away, though sometimes she's looking at me. They don't know I like her, I've only told 1 friend. Even after class I saw 3 of them in front of me and each one of them turned around and looked at me. Why? Homecoming is also coming up. And I don't stare at her much during class.
Why do my crush's friends stare at me?
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