Answer:
The correct answer is Projection.
Step-by-step explanation:
Projection is a concept of psychoanalysis described by Sigmund Freud, and is one of the defense mechanisms explained by psychodinamic theory.
Projection can be understood as the unconscious denial of certain impulses and desires while attributing the same impulses and desires to another person.
For instance, John despises Lisa due to her histrionic behavior but he fails to acknowledge it. In turn, he convinces himself that Lisa hates him.
In this particular case, If Crystal agonizes over her decision for several hours and then accuses her partner of secretly trying to end their relationship, this would be an example of Projection, because Crystal attributes the desire to end the relationship to her partner.