friends

my friends keep making group messages w me in them since we are friends but lately one girl has been hanging out w a girl ( im gonna call her e just in case ) and I don't mean to sound rude and I know it will but every thing e says is annoying to me and idk why we've never really talked much but for example she sent us a picture of her leg that she had painted half green and idk what to do I obviously don't want to be rude so I don't plan in saying anything but I don't want to leave the message either bc it is fun until she says something unusual again not trying to be rude but idk what to do