Top-Hat it sounds like you have made leaps ad bounds in your self improvement and it seems you a perceived connection with your old behaviour and your old town.

I think it is important that you continue to be the cool, new you, so going where you want and doing what you want. There was a link to the site I think Stein or Phenom shared the other day but on there I found this article which talks about our 3 different faces - the face we see, the face we try to show and the face others see - give it a read

Just remember that your friends have changed too, the only difference is because they haven't seen you and the changes you have made, they expect you to be the same as you were when you last hung out. Make sure you don't fall into the trap of allowing their expectations to dictate your actions and the way you now are