i'm such a fan of the charles fell first scenario, because, while i do think edwin realized his feelings first, i firmly believe that charles fell in love with edwin in that attic as he was dying
because you're cold and scared, but this strange boy finds you and gives you a lantern after saying he won't harm you after being betrayed by people who you thought were your friends
you're cold and a little less scared because this boy stays with you and listens to you and answers all your questions and reads to you as if you're not the burden you think you are
you're not cold, and you're not scared anymore, and you're dead, and this boy tells you he knew you were dying but he didn't say anything because he didn't want to scare you and you've never, ever felt so peaceful and safe in your entire life and you never want that feeling to end
but now he's trying to leave, and you can't let that happen, you can't let go of this kind, wonderful boy you've just met, so you ask him if you can stay with him
but he tells you that he just got out of hell, but that can't be right because he's so kind and wonderful and too good for a world full of cruel people so it must have been a mistake, and tells you to follow the blue light
but you can't let go of this beautiful, kind, wonderful boy yet, so you tell him that you're staying with him and when the blue light comes, bathing the boy you're going protect and follow to the ends of the earth in an otherworldly blue, you know you've made the right decision
and if that's not love, i don't know what is