I started reading Alan Roger Currie's book called Mode One. If you don't know about this book, go pick it up. It basically explains why being direct and completely open with your intentions is the best way to go.

Now this girl messaged me on facebook saying "I never see you at your work anymore, why not?"
Me: "Maybe you need too look harder"
Her: "Okay fine I will, but if I find you, you have to give me a hug. Deal?"
Me: "Cant do that stuff at work. If you find me you can come and say hi atleast. Honestly though, I find you very attractive and I'd do a lot more than hug you outside of work. I know you have a boyfriend, but you have my number. So let me know when your free."
Her: "What do you mean when i'm free? "
Me: "when you dont have a boyfriend. Know that if we do meet up I dont want emotional attachment, just physical fun"
Her: "Wow ok, uhhm okay."

I dont know how to take that?
How should I respond?

she gave you an invitation to fuck her

and you brought up her boyfriend?

what the fuck, and your messages kind of suck ass

hehehehe man.. it is not calliborated
Don't fallow game guidelines when you're dealing with everyday people you meet at work, school, or just social circle. You just come across weird. Yeah I see what are you trying to do with this girl but u know it would work on girls that you never met before.

And like the guy before me said she gave u an invitation for fuck and u fucked it up because you were practicing what u've read on the wrong girl. Seriously ?

In general always asume the attraction when you're speaking to a girl but when a girl is messaging you on facebook or txting you assume she wants you to fuck her right there and then just handle logistics and you're in