Pitch x Elsa

I am not sure what the song is called but when I find out I will mention it. Elsa was with Pitch, but kept believing that she was a danger to him and her kingdom. Pitch tries to convince her that they can make them believe in her. She says no because she belongs alone, and he tells her that she doesn’t have to be alone, and explains that long before he thought he was the only one that felt that way. However Elsa can’t take him back, and he asks since when? He complains that despite being the same, she would