What does it mean when a guy calls you beautiful?

He was just playing akinator, it's a game like 20 questions except akinator guesses who you are thinking of.

Since i was sitting next to him, he decided to do me. of course it got it wrong and he was putting in his actual answer, he said just to make you smile, I will say you are the most beautiful girl I know.

He wrote R+B once too. But I am not sure if he likes me because he called me his bestfriend.

Does he like me or does is he messing with me?
What does it mean when a guy calls you beautiful?
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