#Yuji really said he'd keep living with Sukuna no matter what anyone else might say or think and that he'd stay by his side till the very end

[rafumeika]

What Mahito did: Manipulate Junpei into being his friend and then killed him in front of Yuji, laughed about Yuji's desperation to save him, killed Nanami, got Nobara into a coma, destroyed one of Todo's hands

Yuji with Mahito at the end:

What Sukuna did: Threaten to kill Yuji's friend multiple times, ripped Yuji's heart out of his chest and then tricked him into making a Binding Vow that he would have to forget in order to bring him back to life, laughed at Yuji when he desperately begged him to try and save Junpei, told him over and over again that his mere existence would bring destruction simply by being his vessel, destroyed Shibuya and killed countless of innocent people, ditched Yuji to make Megumi his new vessel, then sinked Megumi's soul as deep as he could in darkness in order to keep control of his body, killed Tsumiki, killed Gojo, killed Kashimo, killed Higuruma, killed Choso, almost killed Yuta and pushed him into using Kenjaku's CT to get into Gojo's body, kept praising literally everyone else but Yuji (while still trying to kill them), who he kept talking shit about instead, got pissed when Yuji showed pity and told him that he would kill every single person still left alive that Yuji cared about before finally killing him

Yuji with Sukuna at the end: