With Tsumiki dead, you were Sukuna's next target for two reasons: first, you were too annoying and stubborn to stand aside in her way, second you could be the last point of balance in Megumi and that didn't suit her.

"Let's do this fast, jade wolves" Sukuna joined both hands and summoned the two shikigami in the form of wolves

Sukuna had possessed your boyfriend, then he had killed Tsumiki and now he was trying to kill you, you had to think of something fast or your life would end this instant