I am still not cured from limerence despite repeated therapy – why?

This is a question that I received from a potential client recently, with details changed:

“I have been suffering from retroactive jealousy and perhaps limerence and my partner left me. I’ve tried all kinds of therapy – CBT and a few others but I can’t seem to move forward. I have suffered from it in all my relationships”

This person also goes on to explain that they were in no contact with the people they were limerent with (unclear), that there was a verbal/physical altercation with sai...