You love Sukuna and he loves you...but you still have to kill him. Gojo and the others wanted to. But you can't.

You stand right in front of Sukuna and say "I'm going to kill you!" Sukuna looks at you and grins. "Feeling funny today? You can't do that. You love me." He says. And he was right, you love him too much.

Sukuna gently places his hand on youre cheek. He strokes your cheek with his thumb "You love me, right?"