DEAR MISS MANNERS: I live in a small town where there are many opportunities to know your neighbors’ troubles and help if you can. In the past two months, there have been two families needing help. One friend suffered an illness, and another’s family home burned to the ground. I helped the first friend by driving and running errands. Another friend of that family set up an app where people could sign up to donate meals. I didn’t sign up, as I was already helping in another way. Three friends forwarded the app to me, as they saw I hadn’t signed up: “Hey — did you get this??” For the other fami…