DEAR MISS MANNERS: I took a friend out for a nice lunch to thank her for supporting me through a hard time. At the restaurant, she looked through the entire menu and picked the least expensive dish. I encouraged her to order whatever she wanted, including any appetizers, but she seemed too shy. I was raised to spend less than the person treating you, so I assumed that she was taught the same. Finally, I told her that I planned to order the most expensive thing on the menu, which convinced her that she could get what she actually wanted. Unfortunately, I didn’t want the food I ended up with! I’…