I learned the term from PC and not from professional therapists. The thing that makes those feelings cease is the realizing there is no possibility of a reality of a relationship with that person.
I had thoughts for many years that I did very little about in action and was so perplexed as to why I even had these idealistic, fantasy thoughts. As soon as I learned about limerence and knew there was no reality ever to be, it simply went away.
Thanks for posting. During my time on PC, I’ve noticed only a few others have these same obsessions and I’ve mentioned limerence to them too.