<human>: Long story short, my fiance is an accountant at a large firm in New York City. She works with some really cool folks but it seems there is one guy she tends to bond with more, eating lunch, shooting the shit etc. To me this is not really an issue as her office is male dominated, and going out with females is difficult. Although being an attractive female in this situation must be an ego boost or a nightmare.  I am under the impressions that women and men can be friends as long as there are boundaries ( some may disagree ). 

Since they work together they tend to go out to lunch, discuss work drama and roll in the same work circles. What bothers me though is that after work he has been calling her to kind of "shoot the shit" and text messaging her more than I would even. I have brought it up before and she says she is committed to our relationship and it's just a friendship.

Should I be concerned? A part of me is only because I am losing her attention in a slow and subtle way, but I don't want to smother or over react to the situation as that is not fair to her. 

I also wanted to take the relationship to the next step but it's hard to when there is always the chance that a year or two down the road she is ultimately wanting to do something different or just over it.

Any thoughts?

Can you condense the text into a few key points?
<bot>: A slow budding friendship at her job could be blossoming into more than just a friendship. Am I overreacting?