i've made this post before but i can't get over the way DBDA shows that charles and edwin feel exactly the same about each other. it's demonstrated in everything they do.
it's the way they echo each other's feelings about their relationship, beat for beat, through the whole first season. the same promises to never be apart, the same jealousy over the other's new date, the same opinion that their other half is "the best person they know."
they both keep serious secrets from each other, offer themselves genuinely as a caring ear, and eventually confess - though not the whole truth. they both bring the same lantern when the other is lost and alone, a comfort to each other. they tell strangers that first and foremost, before they are partners, they are best friends.
"you, edwin payne, are my best mate." / "you, charles rowland, are the best person i know." not just the same words, but both of them soothing their best friend's deepest fear. edwin, that he will be abandoned - charles, that he isn't good enough.
and even without all that, they're mirrors of each other in all sorts of clever ways. the way they move in sync and borrow each other's phrases, and the way they exchange glances that communicate their thoughts without words.
they have felt the same the entire time. i think now that edwin has realized he's in love, it won't take long for charles to realize he feels the same in that, too.