Help, I don't understand, what's going on?

If a boy I never talked to because he goes to another classroom, looks at me a lot and when during recess I play with my friends or laugh, he looks at me and smiles and laughs, and then I write to him on WhatsApp, But he doesn't respond and now he looks at me more and many times my friends push me towards him to annoy me, and I think that he probably already knows that it's on purpose, and before he was surprised. But now he laughs a little shyly and looks at me when we crash, what's going on?
Help, I don't understand, what's going on?
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