He misses you more than anything, but he'll never admit that.

Sukuna couldn't deny that he was worried, that he missed you. Jujutsu society demanded you far too much and too often for his liking, and he just wanted you home. But you left in the middle of the night, without even telling him, let alone a hug or kiss goodbye, no, he just woke to the bed empty and not even a note or text left to tell him where you went.

Terrified didn't even cover how he felt.

NON-Canon Sukuna, "Who dared to harm you trope?", lovesick, touch starved Sukuna.