In "A Rose for Emily" why does Emily have basically a nonexistent relationship with her town?

Actually, in Faulkner's "A Rose for Emily," Emily has
quite a constant relationship with the town.  The relationship just stops at Emily's
front door.  But the house is really a town focal point.  The townspeople, apparently,
often watch the house and talk about it. 

In fact, one of
the characteristics of the story that gives it unity is the focus on the house.  Almost
everything in the story revolves around it. 

Of course,
Emily doesn't come out of the house much and doesn't socialize at all, but that just
makes the relationship of a different kind, it doesn't eliminate
it. 

Those who enter the home to talk Emily into paying
taxes, tell the rest of the town about it.  Those who try to get Emily to give up her
father's body, talk about it.  Those who try to put a mailbox on her home, talk about
it.  The pharmacist talks about Emily's purchase of poison.  The town is almost obsessed
with her.  This is a relationship, although it's an unusual
one. 

In short, though, if you need a specific answer,
Emily is so isolated from the town because she wants to be and has to be.  You don't
invite people into your home when you have a corpse of a murdered human being upstairs
in your bed--and you're sleeping with it.