Let me see if I have this straight:
*you move back to a neighborhood where you knew people after a year of healthy, happy living-type changes within yourself
*the people of this neighborhood are admittedly 'depressed' or otherwise dysfunctional
*you don't want to hang around outside with them because all they are doing is smoking and you have not only stated your opinion of such, you abide by it (not joining in)
*they call you hurtful names, poking fun at your recovery progress
*they bicker in a childish way that you don't consider meaningful/helpful (crap) and it's out of control
*you have chosen to stop communication and are keeping to yourself, without name-calling or sinking to their level even in defense of yourself
*without them you feel lonely
Is the above correct?
I'm not sure what about the above is considered "in a very borderline way". Seems to me that you have deemed these people to be 'not good for you' and are moving on. I think it takes courage and resilience to do that-- all part of gaining recovery. Bravo.
I, too, have had my 'circle of friends' change drastically during this recovery process. The only advice I can offer is to trust in yourself and stand by what you deem 'appropriate' friendship behaviour. You will find yourself not so lonely in the end, but it does take time.
During that time-- get out. Go see what you like to do (by yourself) and begin to embody the essence of 'you'. In finding yourself, you will find others who appreciate similar things and bonds form because of it.