As it happens, I don’t particularly like Somerset and would not choose to live there but I would never say anything of the sort to someone who is from there. Large parts of the north are spectacular and people, on the whole, are more outgoing and friendly than those in the south, even if many do have the tendency to “say it how it is.” My dad’s side of the family were from Cumbria and people flock from all over the world to visit it. Far more important is that they were all the warmest, kindest, friendliest people you could ever meet. You have every right to be proud of your background and it is not surprising you feel insulted. She sounds very insecure. I think it is best to try and rise above it as best you can but, if it all gets too much, you could ask her if she really meant to be so rude.