DEAR ANNIE: My husband and I are senior citizens. We are close friends with two other couples; we all have other friends, but these four people in particular have been our core group for years. Over the last few weeks, male friend No. 1 has stopped talking to our male friend No. 2. No. 1 has totally stopped answering texts and calls from No. 2. If my husband or I text No. 1, he will answer but will not join us if we invite him and his wife to a group gathering. He just says they are staying in. No. 2 has texted No. 1 and apologized for whatever it was he did with still no answer. It puts me an…