limerence

noun1

1. •
   An involuntary romantic infatuation with another person, especially combined with an overwhelming, obsessive need to have one's feelings reciprocated.

   • I first used the term ‘amorance’ then changed it back to ‘limerence’ […]. It has no roots whatsoever. It looks nice. It works well in French. Take it from me it has no etymology whatsoever. — 1977