I'm feeling a little suspicious of my neighbour?

[Sommer]

It's always good to be cautious and observant when it comes to people. Especially new neighbors. I actually think that's preferable when you're a mom and have a kid. So don't let yourself feel bad for being suspicious.
Quite honestly he could just be an introvert in the extreme. Which is just someone who isn't comfortable or doesn't find it easy to talk or interact with people.
I know cause' I'm one of them.
For those types, you have to work to get them to relax around you. It's like they live in a bubble. Where they don't particularly need to interact with others to be happy. They are perfectly fine with their own thoughts for company.
Sometimes they may want to interact with people, but don't really know how or the right way to approach someone. And there's an anxiety that comes with being around several people when you don't know how to do these things, which may be why he wouldn't come to your parties.
He may be really sweet but just not great at interacting