Thank you for calling my attention to this post, @yidneth! Your art is beautiful, always.
I think, as you mention in the lyrics, that the song feels more like grief than simple sorrow. Although, to call sorrow simple may imply an unimportance to it, which I do not intend.
But you speak of longing, as well, and that is a mixed emotion. So many layers to that, and loneliness. There is sadness and grief, of course, envy, jealousy, maybe some shame, and perhaps a bit of joy, even.
In any case, you capture the emotion so beautifully in your art. <3 Thank you fo sharing.