<human>: A year ago, my BF (John) worked in a company with this woman (Jess). They were only acquaintances as they never worked in the same team. Apparently, Jess had a big crush on my BF and asked their common friend for his number. Jess then decided to ask out my BF, for which he showed me her texts and he decided not to reply. This did not seem to bother her, because she still tried to flirt with him or had their common friends invite him to parties, etc. 

Now I admit I'm a bit of the jealous type and even though there is nothing in this woman I should be jealous of, I was PISSED. John would often talk about me, post photos on Facebook with me, sometimes he would even set our photo as his profile picture so I know she knows he's in a relationship. It just feels disrespectful to me but I never did confront her because I trust my BF. Anyway, aside from me being pissed off, her attempts did not have any effect on our relationship. 

Fast forward to now, I just found out that she is going to work in my place of employment. And she's going to be working closely with me as she was hired specifically for a project that I'm currently spearheading. Now I don't know how to approach this situation? I'm pretty close with all of my teammates because I'm quite extroverted and I'm always trying to help people or make people laugh. If I try to stay just standard professional with her, people would know something is up. But I don't really want to get chummy/friendly with her at all, for reasons that I don't make friends with people who try to break up other people's relationships (I've been cheated on more than once). 

If you're in my position, please let me know how you would proceed. :)

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Woman who tried to pursue my BF is now going to work closely with me. Woman knows who I am during the course of her failed attempts.