If an outgoing guy who jokes a lot acts shy/bashful around a woman does that indicate he may have a crush on her?

My coworker who jokes around with everyone acts really shy and bashful with me…. like he is nervous. Do you suppose he might be crushing? I’m generally found attractive by most.
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If an outgoing guy who jokes a lot acts shy/bashful around a woman does that indicate he may have a crush on her?
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