3, 4, and the emotional support aspect of 2 read like you are pining for matrimony.
What I want someone to "build" is the cultural environment to make it easier for me to be proactive about my wants. I want a sense of community with my city. I want friends who make themselves more available (and to be one myself). Maybe these are the things that an idyllic small city supposedly offers that big cities do not? I don't know why people don't really talk about these topics often, but maybe it's just me.