My DC is in Year 2 and we still invite his whole class to his birthday because he doesn't really want to pick who to invite and doesn't have a close friendship group (but likes everyone).
We don't expect everyone to be able to come or even reply based on previous experiences, hence inviting the whole class and hoping for 60-75% turnout. However, I've noticed that, even with LOTS of notice, a lot of people apparently can't make it (some a couple of years in a row), and this year even more so than the year before. In reception the turnout was way better so I'm unconvinced so many people really can't make it (on a Sunday afternoon).
We booked a fun activity for his birthday and I know from various sources my DC gets on well with everyone in his class (just not close with anyone in particular, apart from maybe 2-3 kids, but I didn't want to invite just 3 children).
Now that birthday parties tend to get smaller he doesn't get invited to as many as I suppose he doesn't make the cut which I'm OK with. But I wonder if some parents just RSVP No to our invite because they know my DC wasn't /won't be invited to their DCs party so they think it would be cheeky to make us pay for their child’s activity? Or do kids their age start refusing going to parties if they're not good friends with someone /opposite sex etc? (my DC doesn't but maybe others do).
I'd just like to understand why this might be happening so I can decide what to do next year. He will still have a decent number of friends attending so it won't ruin his party, but it's been playing on my mind a lot!