Our new neighbours in a central German village had a housewarming party, where they invited other neighbours but not us.  I wonder if we did something wrong that led them to not invite us.  We interacted a bit in the weeks since they moved in (smalltalk on the street) and as far as I know, this interaction went well.

We have been in the village for a year and in the country for five years.  We are originally from The Netherlands and France.  We talk to the neighbours occasionally and other neighbours had invited us to another party earlier this month.

I don't care so much about missing the party, but I worry if the non-invitation is due to something we did or said and is a sign of a poor relationship with the neighbours.  How can I find out?  Are there some subtle social cues that we could pick up on that would hint that the neighbours might not appreciate something we say or do?  I feel asking outright might be awkward and not necessarily yield a direct/honest answer, but if the neighbours have a problem with something we say/do, it would be good to know as we could take action to improve our relation.  Likewise, if there is no problem that would be a relief to know.

We both have an autism spectrum disorder and are not great at interpersonal skills.

Cultural context: Single-family houses in a 2k-inhabitant village in Central Germany.  To the best of my knowledge, all neighbours are culturally German.  Some are natives to the village, whereas others moved from other parts of Germany.  We are from other western European countries.