Possibly. I think it's more common than you'd think. I also don't think it would necessarily have to be a bad romantic break up either. Like, a family member just died? Or something else emotionally but not romantically traumatic happens? That could take away your alloromanticism for a period of time. I thing long term caedromanticism is fairly rare and would most likely be brought on by a toxic relationship post breakup, but short term caedromanticism is not called that, because the word is not in the mainstream vocabulary, but is still widely a thing.