I think if they’d put it in the movie all fangirls would have died.
Loki: “I was being sincere.”
Thor: “You are incapable of sincerity.”
Loki: “Am I?”
Thor : “Yes.”
Loki : “I’ve looked forward to this day as long as you have. You’re my brother and my friend. Sometimes I’m envious but never doubt that I love you.”