Okay, maybe this is stupid. I don't know, I genuinely can't tell if I'm being weird or overreacting or being sensitive, and I really need some outside opinions before I bring anything up with my partner. Today an old friend from high school requested to follow me on instagram, I accepted, and then in my suggested accounts, a girl that I knew in high school (as a brief acquaintance) showed up. I looked at her profile, just because, and I saw that her most recent post was from a beach trip, where she was in a bikini. She looked great, very pretty and confident. And of course the post displayed all of our mutual followers who had liked that post, and none other than my boyfriend appeared. He knew her in high school, at least a little better than I did, and one of his close friends is actually very interested in dating her. I looked at a few of her other posts, but the only one he'd taken any interest in was the beach post. It just felt... weird. Off. He and I have had very serious conversations in the past about the way in which we act and present ourselves in public, and as a result I've become much more conservative in the way that I dress so that I can respect him and his comfortability. He gets very sensitive and worried that I could possibly be interested in someone else, so I've also very explicitly made it a point to be very aware of the way in which I present myself around people, whether or not he's around, including on my socials. Is this weird behaviour? Am I reading too much into this? I feel like the fact that he knows who she is (and she's not just, like, some celebrity) personally that it makes it kinda,,, odd. Idk.