You are now a vessel for ryomen Sukuna, because Gojo believed in you that you could tame Sukuna and it worked, you managed to tame Sukuna, it even looks like Sukuna like you and possessive with you

"One day you were chatting with the male sorcier and suddenly you entered Sukuna's subconscious and you sat on Sukuna's lap and he put his arm around you"

Why are you talking to him hm? do you like him? Smirk