When finally tired of an unrequited limerence many years back, I used anger. Whenever they came to mind, I made myself get angry at them. I would reminded mys

When finally tired of an unrequited limerence many years back, I used anger. Whenever they came to mind, I made myself get angry at them. I would reminded myself of all the things they had done knowing that it would string me along in that state just a while longer or some small slight that, because of my feelings, they had known they could get away with, or something like that. Very similar to your method, I didn't let them enter my mind without drawing up this rebuttal feeling. About three weeks later it was amazing how free and clear my head felt. Like part of me had been asleep or drugged for years.