DD is 5. She is the kind of girl who likes to play with different people and doesn't have one special best friend. I've invited 3 or 4 of her frieds round for tea, and I'd thought everything had gone well, but my DD hasn't been invited back. I'm starting to worry that its something that I or my DD have done. These friends rush up to DD in the playground and are really happy to see her, so I don't think that she's fallen out with these friends.