I know you said pm but I'll put it here so anyone can chime in if they want.

I like this girl I work with and we get on well, and im not sure if she may like me and be flirting with me or not.
She has a boyfriend who has cheated on her before, but she still posts lovey dovey photos of them together on dates etc.
But she is always asking me on facebook, when my shifts are when they come out I presume to see if they coincide with hers. She isn't really that close to many others we work with, it may just be she likes a friend to talk to at work. She's a very sweet, shy girl so even if she didn't want to be with her boyfriend she might not be forceful enough to push to break up.
Wat do? If anything? Cheers in advance.