MY 10 year old DC has a couple of very close friends, they get on really well at school and see each other out of school also. She also has a wider circle of friends at school and we invite them back to play occasionaly (it's hard to do this often, as I work full-time). However, they NEVER invite her back. I feel so annoyed and upset for her. I don't understand it - they invite others from the wider circle of friends home regularly, so it's not that their lives are too busy for play-dates. And they seem to have a fine time with DD when they come to play here. SO why is she excluded? It's not that I expect tit for tat - if they just invited her once in a while, I'd be happy for her - but they don't. She's a lovely girl (if shy) and hasn't got any enemies - but for some reason, It's got to the stage now where she is keen to invite one of them here again - but I don't see why I should keep hosting these children when the favour isn't returned. But I don't want to upset DD and I don't want to discourage her from being soiciable. Needless to say, I don't know the parents well as I work full-time and seldom see them at the school gates.
What to do?