Hey hk87,
I'm in a similar predicament. I met this girl through work about a month ago and we have been spending a lot of time togoether. She unfortunately has a boyfriend but I think she is possibly confussed about her feelings towards me. I suppose it needs someone to take the intiative. In my case I have backed off a little so she can work out what she wants. Maybe not the most proactive move but I am trying to protect myself. In my mind she is seeing two people. Me for the emotional support and the boyfriend for the physical. Don't get me wrong, I am more than capable of having female friends but regardless of gender there are limits of closeness that I am comfortable with. I suppose that is something you need to determine. Hope this helps.
WN