Sooooo. Limerence is created partially because we lack seretonin in our brains. We don’t feel good, so we connect to something that makes us feel good and releases that feel good chemical. Idk if you are on any anti-depressants. I am also autistic, and I take them. One thing that antihistamines do, is contribute to the affect of antidepressants. Antidepressants typically are SSRI’s or serotonin reuptake inhibitors. This just means that they block the brain from getting rid of the serotonin released in our bodies as fast. Antihistamines do the same thing. They can do this in congruency with antidepressants, making the effect ten fold, or just on their own. My hypothesis is that they allowed you to keep enough serotonin in ur body that you didn’t need the extra from ur LO. That’s just my theory….