To long for Lust or that you are craving somebody proposes that you are feeling unfulfilled in some part of your life. On the other hand, desire implies that you have to practice some restraint.

To dream of lust or that you are lusting after someone suggests that you are feeling unfulfilled in some aspect of your life. Alternatively, lust means that you need to exercise some self-control.

To dream that somebody is craving you implies that you consider profoundly yourself. You have a lifted feeling of self-esteem and self-regard.

To dream that someone is lusting after you means that you think highly of yourself. You have an elevated sense of self-worth and self-esteem.