Holy shit, IM SUSPICIOUS OF MY NEIGHBORS

My neighbors IM SUSPICIOUS about them, they watch closely whenever I leave or arrive, they put up a surveillance camera (I don't blame them, they do have a lot of kids), I invited them over for a Christmas party I hosted and whenever I was away from the table, they were in my room. What is up with them? I'm going to try and be nicer to them and see if it gets any better but I don't really want to be around them anymore.