As I’ve stated over and over, hurting people will hurt other people. When we recognize this, we can invest our energy in one of two directions. The first direction is, we can draw appropriate boundaries. This is not to shut people out, but rather to shield ourselves from the consequences of their hurtful behaviors affecting us more than them. The other direction is to try and change that person, who, by the way, will only grow more and more difficult with every tightening grip of your attempted control. And even if you were successful, the most you could ever accomplish is behavior management.