Friend posted selfie with my boyfriend only

My friend barely ever posts stories, but when she does, it's a duckface selfie with my boyfriend—and I'm not even in it. Am I crazy for finding that weird?

So this has happened a couple of times now, and I can’t shake the feeling that something’s off. I had a party at my place last weekend. Nothing huge—just friends, drinks, music. One of my friends, who rarely posts anything on social media, suddenly decides to put something on her story. And what does she post? A selfie of just her and my boyfriend. Not a group pic. Not one of us together. Just the two of them.

And yeah, I know it’s just a photo, and maybe it doesn’t mean anything. But it feels weird. Especially because she doesn't even know him that well. They've only been around each other a handful of times, always when I've invited both of them. She usually posts a selfie of us together when we're hanging out, so I figured she'd do the same this time. But nope. Just her and him, and of course she had the duckface thing going on.

Maybe I’m overthinking it, but I feel like if I was at a party hosted by my friend, and I took a selfie with her boyfriend, I’d make sure she was in it too. Because otherwise, it just feels... kind of disrespectful? Or maybe it’s just social etiquette that I assume everyone follows.

Have any of you experienced something like this? Is it weird, or am I just reading too much into it? I haven’t said anything to either of them because I don’t want to seem jealous or controlling, but it’s been sitting in the back of my mind and making me feel uncomfortable.