DEAR ABBY: My husband and I have a friend, “George,” who rents our upstairs. Our home is large, and the second floor has all the amenities of a 2,500-square-foot house. He has his separate entrance and never has to come through our living space. In the beginning, I agreed to the arrangement because he was going through a divorce and needed a place to live. Now, for the past several months, his ex …