I'm in a bit of a difficult position. I invited one of my friends to my wedding with her boyfriend of four years--both names on the invite. However, since he can't make it she invited one of her other guy friends to come instead. Initiallly, I was annoyed but okay with it, but the more I think about it, it's really bothering me. We're trying really hard to keep the wedding small, so our single guests were not invited with guests. I feel like it's unfair that she gets to bring one, while the other people don't.
She's not traveling for the wedding, and while not good friends with any other attendees, knows 6-7 of them fairly well. How would you handle this? I want to just be open to her about it, but she gets very defensive so I'm afraid of how to broach the subject.