Liberals state that many teenagers would rather sell crack for $100 an hour than to flip hamburgers for a minimum wage. Using the same liberal logic, you might think it would make more sense for the average middle-class worker to rob banks rather than work a forty-hour week? The reason why most people, rich and poor, do not commit crimes because they know it is wrong to do so.
You can't save a relationship unless both people are equally invested. It takes a joint effort to make it work. One person trying will never be enough.