I'm having a moment of insecurity about my DP. I've always known that he found a friend's partner attractive ever since I met him about three years ago. Just little comments like calling her Fatty when she was pregnant (I hated that but didn't say anything as we were a new relationship), saying that she was much too good-looking for his friend, and just recently asking me if she was coming along to a sporting event. That's it. She's pregnant again so maybe that is related to my worries. I think she's a lot more like his separated wife than I am.
Am I being silly? What would you do?