Final answer:
April is exhibiting signs of an Erotomanic delusional disorder, characterized by a person's belief that another individual, often a celebrity, is in love with them, despite clear evidence to the contrary.
Step-by-step explanation:
In the situation presented, April seems to be exhibiting signs of an Erotomanic delusional disorder. This specific type of delusional disorder is characterized by a person's belief that another individual, typically a celebrity or person of higher social status, is in love with them despite clear evidence to the contrary. Patients affected by this condition usually fixate on their object of affection, may write copious amounts of letters, and envision a nonexistent romantic relationship .
To be clear, Bipolar disorder is a mood disorder noted for alternating periods of mania and depression, Histrionic refers to a personality disorder exhibiting excessive need for attention and Persecutory is a type of delusion where the affected person believes they are being conspired against, cheated, spied on, followed, poisoned or drugged, maliciously maligned, harassed, or obstructed in the pursuit of long-term goals.
Learn more about Erotomanic delusional disorder