We moved a few weeks ago so that DS2 could have a garden to play in. The next door neighbour has a grandson who is in the same class as DS2 at school. We didn't know this when we moved but it was a nice added bonus. The little boy has been over here playing a few times, but DS2 gets a bit frustrated and cries and whinges.
The last few times the boy has been visiting next door his mam has stopped him from coming over, saying they are going shortly, but stopping for 1+ hours. I don't think he will be coming over again :( It's a shame as DS2 would have gotten used to hving him here eventually.