What could it mean if a guy starts to open up ,becomes more confident, funny, nice around a girl?

Anonymous
Earlier he seemed pretty shy,nervous around me.Now he suddenly feels much more comfortable, loves talking(especially if we are alone),starts to tell some little personal things,seems enjoying talking with me-broad smiles,sweet eyes etc .



What happened so suddenly?

What could it mean if a guy starts to open up ,becomes more confident, funny, nice around a girl?
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