The human brain can and does change. In fact, science tells us that learning marks the brain in an actual physical way. Our brains can develop new connections similar to how our biceps grow when we hold and curl dumbbell heavy weights. And the more you lift the weights, or use the brain, the stronger you become and the easier that weight you are lifting gets. It's not that your brain grows in size like your biceps can, but it can grow in intelligence as well as speed in which it functions.
In that vein, we can accelerate the speed and increase the efficiency of our relational intelligence by developing new frameworks of relating to others. There are many examples (lots found in my book), but it baffles me how self-absorption and disinterest in others ruins and dissolves relationships, and most people even realize it. When I talk to people about learning to be interested in others, most people think they are (but often they are not).
If we are genuinely interested in others, we'll become more responsive in how we listen to them rather than neglecting to express ourselves as it relates to what they are saying. Also, we'll interact specifically with what they are saying rather than always steering the conversation to being about us. And, we'll learn to ask more questions rather than always offering up the answers or responses that try to prove to them how much we know or have experienced in life.