That is interesting... I am not sure how true can that be
though... 
dnt tink it's 100% true, to my thinking of coz.
Maybe that guy / guy are friendly type can be quite close
type.
Dnt be offended by my idea below ok.. Just some thoughts from me.
tks..
SIGN #1:
He flashes his brows and smiles when he sees you.
Maybe flashing as flirting or
disturbing a close lady fren. May not means
otherwise.
# Body Language Decoder: Raised brows signal attraction: It's the
universal sign of interest and it exists in every culture. In fact,
some experts think it's the most recognized non-verbal sign of
greeting used by humans. When we're attracted to someone, our
eyebrows rise and fall subconsciously. And when the other person is
similarly attracted, they raise their brows and smile in return.
The whole exchange lasts less than a second, though, so it can be
easy to miss unless you're looking out for it!
SIGN #2:
He points his body towards you.
Maybe the couple could be in a rather
close relationship as fren, that he might sit at his comfort.
Doesn't mean he not intrested right ? My thinking
again.
# Body Language Decoder: If he's across the room, take a peek at
his hands and feet: We tend to point toward the object of our
desire subsciously. When we find someone attractive, we'll often
point (with our hands, feet or toes) toward that person.
If you're engaging in a conversation with him sitting next to you,
it's even easier to tell: If he leans slightly forward and keeps
his shoulders and upper body squarely facing you, it shows that
he's deeply interested in you and what you have to say.
He lean forward to flirt ?? We dnt
deny there are flirt around do we ? heee
SIGN #3:
He gazes at your lips while you're talking.
# Body Language Decoder: Our eyes have a body language all their
own. A major telltale sign of how we feel about someone is our
gazing pattern: When we look at acquaintances, like at business
meetings, we keep our gazes at eye-level, focusing on the other
person's eyes and the bridge of the nose.
With friends or someone we like, we hold our eye contact longer
than usual and our gaze moves down to include the nose and
mouth.
What if he is shy dnt dare to do eye
contact with the gal ? Some
guys are so shy till they dnt dare to look at you.
And if he's romantically drawn to you, the look can further drop
down to include parts of your body like the neck or shoulders. This
type of intimate gaze conveys interest. It's as if he can't resist
caressing the rest of your face and hair with his eyes, or he's
imagining what it feels like to kiss you on the lips.
SIGN #4:
His pupils widen and he blinks more when looking at
you.
# Body Language Decoder: The size of our pupils adjusts according
to two things: Light and attraction. It's a biological reaction we
cannot control. Secretly compare his pupils and another person's
(like your girlfriend if she's sitting beside you) in the same
surroundings. If we're looking at a person we like, our pupils will
dilate, so will our blink rate. The reason: When we're excited, our
body releases more adrenaline which results in dilated pupils and
faster blinks, the same physiological process that makes our heart
pump faster and our knees weak!
SIGN #5:
He laughs at just about everything you say.
Maybe the gal is a joker ? I
mean i am one of the joker and teaser lor...
# Body Language Decoder: If his eyebrows remain slightly raised
while you're talking, it signals that he finds you fascinating.
Another obvious sign that he likes you a lot: He nods, smiles,
laughs and agrees with just about everything you say, including the
silly stuff. He's not just being cordial, he's genuinely happy to
be with you!