How do you know if a SHY guy likes you?

ifyouloveme__
the question says it all. I want DETAILS and please be specific. Like tell me how he'll act and stuff like that :P And is this true, no matter how shy a guy is if he truly likes the girl he'd still try to talk to her? or at least be happy she did and try to keep talking? Cause theirs this one guy and we both like each other but every time I try to talk to him he pushes me away? but yet he still likes me like a lot? wtf is up with that.
How do you know if a SHY guy likes you?
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