I realized Frigga was one of the last people that Loki actually cared for and her death broke his heart, a part of him blames himself for it. There's no going back for Loki. I predict that he will slowly go into madness in the next Thor movie...heartbreaking. Tom did an amazing job capturing all of Loki's complexity on screen. I cannot see Loki getting a redemptive ending. He is the god is chaos, fire, destruction...will his ending be the same?