Some people are just that way, probably for a whole range of reasons (some neutral: past bad experiences, shyness, overprotectiveness, etc. Some bad: snobbery, think they're better than others around them, antisocial types who don't like anything/anybody, etc.).
I wouldn't worry about it. Appreciate/enjoy the other neighbors who
aren't this way.
It's what I'd do. I'll give anyone 2-3 chances in this type of situation. After three times, with you making all the effort and with nothing to show for it, I'd say the writing is on the wall.
What are you gonna do? You've given it a good, honest effort...you can sleep at night (
and you get karma points for trying).