You are right. Only she can change herself. She has the ability to choose to love. But she chooses not to love. It is like Dorothy in the Wizard of Oz, she had the ability to go home all along. And your wife has the ability to choose to love you. Of course, it helps if you try to be lovable! But it sounds like you are trying to be nice. It doesn't matter if she stays for the kids or any other reason. What is important is the choice. Have a regular date night. The help of of a good counselor or pastor could help you both.