They're both madly in love with you but they fight over you making you to choose one of them putting you under pressure

Gojo: you walking curse, leave her alone she's mine. She will end up choosing me, stay away from her

Sukuna: no she's mine you six eyes, white haired dumbass. She's definitely gonna choose me

as you watch them bicker with each other, they're pushing each other as if ready to murder each other