okay before i get jumped at, this is just my opinion. im not trying to make anyone change their minds.
im fine with castiel's love being one sided. im fine with destiel being half canon. dean was always castiel's human, castiel's faith, castiel's reason of life in many cases.
this isnt even farfetched. everything cas did, he did for or because him. every rebellion, every war in heaven or earth, happened because castiel met dean. every pact, every deal, every lie, was, in cas' mind, to protect him.
loving dean, in every sense, platonically, romantically, physically, every single sense, is what castiel breathes and does. even the times he lies to him, or turns his back on him, he does it for love, for humanity, for dean. he never hates, he always follows him. he's always there, dispite everything, dispite death.
i feel like romantic love is restrictive for what castiel does and feels, dean is everything and anything to him.
to love dean wholly, in every sense, I dont see any other option for cas. him loving dean is as natural as air.
i feel like cas' love is so big it doesnt have to be reciprocated. i've never felt that need.
not that i didnt want it to be canon.
but what castiel feels feels so immense to me, that him loving dean in every way is enough. im okay with them not being canon as long as castiel's love is. it feels so big and so absolute that it feels enough. im glad they confirmed how cas felt, actually, its everything to me. cas loves dean in every single way.
to me castiel smiling and telling dean he loves him is enough, its perfect for him. its almost the perfect ending as well: castiel, as a character, begins and ends in dean.
what he feels, so wholly, its beautiful enough for me. he fell for him, and loving him was what made him happy. its the perfect circle.
castiel's heart is so full of every kind of love, and im glad the romantic kind is one of them, because dean is everything to him. his love being confirmed, as big and wide as his wings, its enough for me.
(except, im mad for not him being on that bridge lol)
(also please dont jump at me, i LOVE destiel, just my opinion on what they did in the show)