"I thought I was just RSVP-ing like everyone else," she told Newsweek. "But as I scrolled through the first page, there it was—the wedding party list—and my name was listed as a groomswoman.

"We will have been together two years at the date of their wedding and have currently lived together for 8 months," he shared. This lack of an invitation wasn't a mistake or oversight, either.

It's your responsibility to RSVP, show up on time ... Often it's a save-the-date or an invite, but sometimes it's a wedding website, Facebook group, or long text thread. Related stories Whatever ...

For those royal families in Europe who didn’t already know, there’s a wedding happening on April 29. Now the senior members of those families have received save-the-date notices from Buckingha ...

It's your responsibility to RSVP, show up on time ... received at least some correspondence from the couple. Often it's a save-the-date or an invite, but sometimes it's a wedding website, Facebook ...