Wiktionary
distancer
n. (context psychology English) A person who tends to maintain emotional distance and detachment
Usage examples of "distancer".
The pursuer-distancer couple will also have to change, with the distancer shifting from always running from his/her partner to specifically thinking "how do I want to be closer.
I drank brandy and painkillers with dedication: possibly medicinally a bad combination, but a great distancer from tribulation.
She was looking right at Han, and yet he had the distinct impression that she was looking over his shoulder, into the middle distancer into the next galaxy over.