I'm having a fairly small wedding (just over 50 people) so a lot of people I know, and are friends with are not invited. But a lot of people are assuming they are. It's not like I've brought up my wedding to them, they've just assumed they are being invited. The only people I've told when they mentioned were friends who thought they were in the Wedding Party, so I kind of had to tell them, and they both said they would pay for their plate, and I felt horrible telling them they still aren't going to be invited.
What's the best way to tell people they aren't invited to my wedding, under any circumstances, without seeming horrible?