But if his mom died for him and the reason he wants to go back to his world is so that he ...

But if his mom died for him and the reason he wants to go back to his world is so that he can repay those that took care of him then that feels like hes just doing this for others rather than for himself?? Like i know his mom would definitely want him to be happy, rather than living in a world where he regrets his past and feels like he caused the problems of others. Like she would want him to not feel alone anymore so i think its best he stay with caius honestly