I vote party at your house and the whole internet is invited.

Which movie???

Facebook "friends" aren't real friends.

Was it a personal invite and did they say they'd be over? Or was it a post on facebook with a lot of likes?

next time just invite your grandma

Did they formally acknowledge the invitation and say they were coming? I once invited a bunch of people from work to a July 4 cookout at my house by way of printed invites left on their desks. Not a single person showed up. On the other hand, a good friend emailed out invitations to my wedding reception to our ballroom dance community. We had no idea who would be coming, and the place was packed. My takeaway from this is people will show up if there's free champagne and dancing.

**** 'em. Grab some snacks, and beer (or soda, if you're under 21), and enjoy the movie alone. They'd have probably talked over it, anyway.