"The Courage to be Disliked" is one of the best books I have read in a while. It challenges some of your core assumptions (like there is no trauma or that the interpersonal relationships are the root of all problems) and provides you with a framework to help you structure your life. It shows a lot of healthy ways to think about the way we approach interpersonal relationships.
No experience is in itself a cause of our success or failure. We do not suffer from the shock of our experiences—the so-called trauma—but instead we make out of them whatever suits our purposes. We are not determined by our experiences, but the meaning we give them is self-determining.