Erotomania is seen in
In erotomania, which has also been referred to as de Clerambault syndrome it is also called as psychose passionelle. here the patient has the delusional conviction that another person, usually of higher status, is in love with him or her. Besides being the key symptom in some cases of delusional disorder, it is known to occur in schizophrenia, mood disorder, and other organic disorders. the persons on which the delusions are built are stalked and there is even risk of homicide. Reference: Kaplan & Sadock's Synopsis of Psychiatry, 11th edition, Page 336.
Bipolar mania
Unipolar mania
Neurosis
OCD
Symptoms and signs in psychiatry and classification