Ok, here's the setup. I've been dating this girl for about a year now. About 9 months ago, I upgraded her from a plate to exclusive. She likes my "guy game." One year in, we live apart, she cooks all of my meals, cleans all of my dishes, fucks me 5-7 times a week, regular blowjobs. Our relationship is fine and satisfying.

We went to a music festival this weekend. We're camping next to a few guys who seem pretty cool. We hang out with them a bit. One of them starts hitting on my girlfriend. He's real slick, though... for those of you knowledgeable about powertalk, he had plausible deniability and all that.

I knew what he was up to... about 90% attention on her, tried to ignore me for the most part, etc. As soon as I said her name (to her), he started using it... touched her arm a time or two, etc.

As far as she goes, she might not have know what he was up to. I knew, for sure. For context, this girl has had orbitors her entire life, and is genuinely surprised years later to find out they had crushes on her. (usually in some weird drunken confession on their part.) I told her the following day that I "noticed he had the hots" for her. She thought he was just being nice, so she said. Maybe true, maybe not, but no matter for my question. I'm just trying to give all of the details in case I'm missing things.

Update before post...

I've talked to her about these things to some extent.

What I didn't talk about... was that after the "You're a lucky guy" comment (which was in front of her), she got shitty with me later in the night. I'm 95% sure those things were related.

My reaction was a dismissive shoulder shrug. His reaction to that was to try to provoke a comment. He says "What?" My reaction was another dismissive shoulder shrug along with "Huh?" My girl: "he thought you said something." Me (to both him and girl): "nah." My girl clearly didn't understand the subcommunication happening at the time. Anyway, that's not her job.

I still need to figure out how to handle the "you're a lucky guy" comment from sociopaths. This wasn't some beta that admired me. It was a very subtle power move right in front of me. (and her.)

Anyone have insights on this? I know it's not a "beginner" question. Maybe this isn't even the place to ask, but I'd appreciate input.