It’s not a turning off of the emotion, it is a letting go of the desperation.
You still love the person, and want to be with them, but after the ritual you either have to know beyond all doubt that they are yours and are just waiting for the universe to catch up or release the attachment and be okay with not having them.
A good way to look at it, once the spell is done, is that the target is currently away on a business trip and you are simply waiting for them to come home. You expect them to return, even if you don’t know exactly when.
The problem a lot of people have with love spells is the waiting part. They are so desperate and impatient that they are focusing more on the lack of this person than on an expectation of them returning.