Thanks to everyone for their replies.
I believe I am more on edge and suspicious than normal because I also found out last week that my boyfriend had been lying to me about something major for three months. This was not related to any other person such as a woman, a co-worker, etc. I knew something had been going on with him and finally sat him down and told him he needs to tell me what is going on with that particular situation and he did. This was regarding substance use which I am helping him work through and providing the support he needs to get past it. I would have included that in my initial post but I felt it was too long already, but it is relevant as it has created some trust issues. I was also cheated on multiple times in my previous marriage (I am seeing a therapist to work through this).
A lot of people are asking me how I have read his messages from work and that is understandable. When he started mentioning this person seemingly out of nowhere I simply asked if I could read his communication with her which I do realize is not the healthiest thing to do. (He is able to look at my phone or computer if he asks, if I remember correctly he has asked maybe twice, but I’m not specifically counting). Again, not the most appropriate thing to do in a relationship. At the same time, I believe if two people are in a serious relationship and discussing marriage or otherwise plan to spend the rest of their lives together neither partner should keep any secrets from the other.
So, I don’t know. Maybe I am creating something out of nothing given the insecurity about the other issue. I suppose I felt it was an odd interaction between two people as I am typically friendly but am cognizant of saying things to my co-workers that could potentially be misconstrued.
I think redswim30 asked a good question about why I feel threatened by this person and why it bothers me they would have a crush on each other. I don’t really know enough about this person to gauge that. I’ve never seen her other than the picture she has on her Teams profile. Yes, she looks pretty, but that is not what bothers me. I think I am carrying baggage over from my previous marriage and that I read some statistic that 1 in 5 people admitted to having an affair with a co-worker.
Thanks again for taking the time to reply.