DEAR HARRIETTE: I have a friend who is a wine connoisseur. She knows a lot about it and spends a lot of money on it. I don’t have that kind of money, but I do enjoy wine and like to serve it when guests visit. I find my friend to be obnoxious about her wine tastes. I see her turn up her nose when she sees my selections. She has taken to bringing her own bottles when she comes over to my house so t…