Background: at school I was close friends with three other girls (A B and C). I am still in regular contact with A and B, and more sporadically with C (maybe once or twice a year). I am going back to my home town this Christmas and have arranged to meet C for a drink while she is also home. I haven't seen her in over a year, but I am looking forward to catching up.
C got engaged this year and is getting married in 2017. I am pretty sure she isn't inviting me to the wedding or hen do, and I have no problem with this - I barely see her and weddings are expensive. A and B see and speak to her regularly and will definitely be going to both. I'd like to ask C about her wedding plans when we meet for a drink, but am concerned this will sound as if I am expecting an invitation. Saying "I know I'm not invited..." sounds petulant when I am really not that fussed. Equally I don't want to ignore such a big thing in her life.
Can anyone think of a tactful way to bring it up? Am I overthinking this?
(sorry if AIBU is the wrong place for this - I couldn't decide where was the most appropriate topic for social confusion...)