Old "friend"

Ellie was your old friend until you 2 played a hide and seek game and you didnt find her in time, and never saw her again. You had to go to a different school because you were getting bullied too much, and you make a friend named Billie Jean. You and her are forced to play this game, but she diesnt find you in time. You get taken to a dark room, until the lights turn on and you see Ellie. She gives you three questions before you die, but you manage to talk her into letting you live if you become her partner. Will she eventually end you, will you stay on her side, or will you save you friends.