@corythatwas
It doesn't have to be massive things: littledoll's response is perfect: "you would be much better just saying 'sometimes you get invited, sometimes you don't. Let's go to the park instead and play on the swings and slides!'"
Thank you. 
That's the sort of thing I used to do. 'Distraction therapy' I think it's called - or something similar. Diverting them away from something 'negative' to something more positive.
On a few occasions, DD and a friend of hers would fall out, (when she was younger, like primary age, and young secondary age) and she'd come in crying saying 'Alice says she is not my friend and walked away from me....' She would be in tears, and I would hug her and say 'let's go feed the ducks or the horses,' or 'let's play a video game for half an hour,' or something she really enjoyed, and she would often cheer up and put the issue that was upsetting her to the back of her mind.
No point in causing arguments with other kids (or their parents,) as 90% of the time, they'd make up the next day! Some parents would were bloody nightmare though, and got terribly involved in the childrens spats and arguments. They's really fall out, and still be enemies waaaaaay after the kids made up!
@Lizzie48
I'm certainly not the only one that does that. I thought that was the convention on here, that when not in bold OP meant opening post. Okay, if that's not the case I won't do it anymore.
Awwww, I'm sorry Lizzie....
I didn't mean anything by it! I'm just being a silly asshole. You carry on posting how you want to. Just ignore me. 😝😛😁