Looking for advice on how to deal with this situation.
I’ve been with my girlfriend for over a year and our relationship is great. We love each other a lot, do everything together and talk a lot about the future.
She has a lifelong family friend who is married to this guy. She goes on family vacations with this couple, and I’ve also spent time with them all together which has been fun. However the more I’m getting to know them all, the more I’m convinced that my gf has a fairly serious crush on the husband. When I see her around him she acts very excited, flirty and is always trying to attract his attention. The three of them have had nude saunas together, and once I caught her walking around with no underwear on whilst he was in the house we were all staying at. I regret not mentioning anything to her at the time because this made me / still makes me feel uneasy, but the moment has passed now and I don’t want to bring something up that happened a while ago.
She also brings him up in conversation, commenting on him being an interesting and admirable guy. And when somebody talks about him it sparks her attention quite heavily.
I’ve never asked her about her feelings toward him because I think she’d deny them for fear of things becoming awkward. She told me before I was introduced to the couple that he’s become a really good friend, and after I’d met them was happy that I liked him too, because the couple are an ‘important part of her life’. However, she doesn’t actually spend much time with the couple.
I trust that she won’t do anything inappropriate, as she respects her lifelong friend as well as our relationship. But I can’t get over her flirting with him and clearly being quite into him. It plays on my mind quite a lot and when she brings him up it annoys me. Even though I like him as a friend myself. I should note that I don’t think her feelings toward him are reciprocated.
Am I just being overly jealous? Or is there a way I can approach this with her to better understand her feelings?
TL;DR my girlfriend has a crush on her lifelong friends’ husband. I trust nothing to happen but her feelings annoy and upset me.