After living in NH for 32 years, we moved to NC. I remember meeting a mom at my son's preschool about 6 months after we were here (she's from MA so she understood the New England "thing"). Although we chose NC after loving it and visiting it many times, there was still an adjustment. We liked it, but I remember asking her when it would feel like "home". She said it took her about 3 years. Others have said the same thing.
We're going on 4 years now, and I'd have to say that it was about a year or a year & a half ago when I started to feel "complete" and "settled". Now, I cannot imagine living in NH again. I miss family, fresh lobster and haddock, and the Patriots and Bruins, but that's it.
As other posters suggested, letting go and trying new things in you area will help you. Start following local news, get involved in a church or other civic/community event, visit local shops and take in the PA culture where you are. It will take time; don't beat yourself up that it still doesn't feel right.
Wishing you all the best & sending :grouphug:.