Is body language of attraction for real?

I’m pretty sure when you google signs that a guy likes you, you will get something vague.

Such as preening, many guys mess up/flatten their hair because the social situation makes them anxious.

recently I have been observing this guy because I find him cute, but I am not sure if my feelings caused me to have confirmation bias.

What I have noticed:
When he stands across the room, his feet point towards me. (I know it’s ridiculous, because it is such an insignificant and coincidental sign).
And when he sits near me, he spread his legs apart. Like not normal kind of apart, really very far apart. I get amused when I think of the possibility that he is showing off his privates to me. But after years of failed body language reading, I have learnt to take this with a pinch of salt.

But does anyone find body language to be a good predictor?

by the way we are not strangers. I do know him and I have spoken to him.
Is body language of attraction for real?
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