My crush who works at this shop that I buy stuff from always jokes around with me when we are alone but just the other day his friend was there and after I walked in all of the sudden they stopped talking and he was very professional but after a few seconds he looked at his friend and giggle what does that mean when guy do that

He may like you but his friends may not so he's probably just trying to stay cool with his friends. So he most lickly likes you.

Please answer my question.