Our social circle is really small, my wife has no friends and neither do I so we mostly interact with family and relatives, which we don't have too many as I am the only child and my wife has a brother and his girlfriend that is mostly our social circle. So we mostly rely on each other for social interaction.
On a funny note, I work and walk around the house in only shorts 90% of the time. My wife frequently jokes if I even own a shirt :) That is mostly because I run hot and we have a tropical 24 degrees Celsius 76 Fahrenheit 24/7 in our home as the ladies like it warm...
I think it is good to have a tight-knit group, but I also like to have some randoms about too for perspective. Are you close with your family?
Man! I feel you about the warm house! I do the same for the same reason, though my daughter takes more after me than my wife and runs hot too. I also wear shorts until the end of autumn and barely wear winter jackets unless it drops below minus 10 :D