One of the diagnostic characteristics of Asperger’s syndrome is the development of a special interest that is unusual in terms of its focus or intensity.
In adolescence and early adult years, the focus can be a person, which could be interpreted as a typical teenage “crush,” but the intensity and some of the associated behaviours could lead to accusations of stalking or harassment.
An act of kindness or compassion can be perceived as a signal of a deeper level of interest or more personal than was intended.
I have had to explain to men with Asperger’s syndrome that the smile and personal attention of a female member of the cabin crew on an aircraft are signs of courtesy, not indications of a desire for a relationship.
To achieve a successful relationship, a person also needs to understand and respect him- or herself.