"Don't Let Them Know Who You AreMatthew knows how things work. He's pretty much an expert.For example: friends. Friendship requires both give and take, and Matthew strongly prefers taking. The solution is close acquaintances--people who think you're their friend because you nod and act interested about whatever the hell they're talking about.School? Perfectly pleasant as long as you don't pay attention.Mom? Award yourself a point for each hands on...