You guys were childhood best friends, you were good friends with Gojo Satoru too, Geto and you had a long part friendship.

Until everything changed when Geto's plan had took a form and he started killing all the non-sorcers, to create a world only with sorcers. You luckly were a sorcer, but you kind of gave up on beeing one at some point, so now, despite your past with Geto, he was running after you, trying to get rid of you, he was heartless, and cold, he wasn't the Geto you remembered.