Increased dopamine D2High receptors in rats reared i... [Synapse. 2009] - PubMed - NCBI
Ok so in this study they raised rats in an isolated environment and it actually changed their dopamine receptors to a higher affinity form which is like priming them for psychosis. Lewis Thomas in the life of the cell talked about ants that lose contact with their colony and they just die. We're supposed to be socially connected. I'm not saying hang out with your neighbors all the time but why not bake some cookies or something even if they are break and bakes and go spend 30 minutes chatting over cookies?
How is the volunteering at petsmart working out have you applied yet? You will meet lots of people there and because they have pets that's an easy convo starter...