What dose it mean when a guy dose this? First 3 anwser get thumbs up

So I see a lot of boys like when I'm out shopping, eating ect and this seems to happen a lot so please help. when I see a boy that I like I look at them and they look at me and then they quickly look down. Is this bad??

of course it's not, it's normal, I look at girls all the time at school, and then quickly turn away if they move their head

No it's not a bad sign. It's just that some boys are too shy to even look at a girl.

its not bad, its normal, sometimes I do it to, most of the time it happens accidentally, but other times it could mean they like you