I'm struggling a bit with this. I keep telling myself that it doesn't really matter but I am also a little bit bothered.
I have a friend that I met through ante-natal classes with DS, let's call her X. DS (3) and her DD have known each other since they were born and go to Pre-school together and are good friends. As well as this my friend and I also have older DD's who go to school together and are in the same class. So DD and her DD (lets's call her Y) have known each other since they were 2 (through younger siblings and ante-natal) but it only came about through our younger DC's. Our Ante-natal group continues to meet and the fact that I also see the Mum at school means that I would class us as friends. Not really really close friends (like your bezzie mate) but I would say that she was one of the Mummy's at school that I am closer with.
DD has just told me in passing that it's Y's party in 2 weeks and that she hasn't been invited. DD doesn't seem that bothered by it. I knew that it was Y's birthday sometime in Oct but couldn't remember when. I am quite fazed by this as I just naturally assumed that DD would be invited. To be honest DD and Y don't play together that much at school. They are certainly not best mates. However I would have thought that X would make sure that DD was invited, more because of my relationship with her and also her younger DD and my DS, who are friends (who will also be in the same class at school next year). I could understand if money was an issue that there is a limit to who Y could invite but I know that is not the case. To add insult to injury my DH and her DH also get on quite well. I just told DH and he was quite angry as he thinks DD should have been invited too and doesn't understand why she hasn't been.
My point is that I understand that DD and Y probably aren't that close at school, but shouldn't the fact that we are quite interwoven as a family mean that DD should get an invite? I feel really silly and about 15yrs old saying this but I didn't for a million years think that DD would ever not be invited.