[ No, it isn't so much that he forgot, but he did not realize how much stock that Itadori put into him being important to him. There is concern that he feels in that, because there may come a time when he may be injured or worse; he would rather the space that he held in the teenager's heart and spirit be something negligible in order to spare him any pain.
In his opinion, Itadori has suffered enough.
But at the same time, those are his own selfish feelings. His own selfish wish without taking into account how Itadori feels and what he has already decided to do. He is not so much of a child as to demand the impossible out of someone, and not so much of a heartless person to dismiss the kind intentions of someone that he cares about, too. ]
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In his opinion, Itadori has suffered enough.
But at the same time, those are his own selfish feelings. His own selfish wish without taking into account how Itadori feels and what he has already decided to do. He is not so much of a child as to demand the impossible out of someone, and not so much of a heartless person to dismiss the kind intentions of someone that he cares about, too. ]