My friend invited me to a concert — and then asked me to take him for dinner

Dear Quentin, I have a good friend whom I like very much. He is one of those people I feel very comfortable around, as if I have known him for years. It’s hard to make friends in New York. People have so little time for friendship after work, the gym, kickboxing classes, therapy, checking their stock portfolio and, frankly, plotting their next move to climb up the…