I was a victim...

of something very similar to erotomania. It was `intellectual' rather than erotic, but otherwise fits the description on wikipedia to a T. For eight years I had no peace, I did not know where the next attempt to approach me would come from.
Like Loic, I tried to deal with it myself. It was so weird, other people couldn't understand. I only got relief when I went to the DA, who was great. After a month in jail, my stalker moved on … to another poor fellow.