DEAR ABBY: I live in Atlanta, and my family lives four hours south. My brother travels here often to visit his girlfriend and their son. I never know he’s in town unless another family member mentions it or he posts a photo of himself at a local landmark. My parents and brother came here to attend my nephew’s school band concert. No one mentioned that they were coming or contacted me during their visit. I learned about it after speaking with my grandmother the following day. Since then, I have spoken to my parents once briefly, and they still haven’t ...