Dean Winchester does not know how to have a normal friendship because his only 'friends' growing up were his family, Sam and John, because John isolated them to keep them compliant. This means that when Dean starts making friends post John's death, he treats them like family, and his treatment of family is an intense devotion that he would lay down his life for. He loves his friends and Dean Winchester's love is fierce and all-encompassing. All this to say, of course all of Dean's besties (Cas/Benny/Crowley) fell in love with him? These lonely interlopers who do not quite fit into the categories laid out for them, who are set aside from their peers and left out in the cold of only observing belonging but never touching it. Of course they felt the warmth of Dean, who feels things like a wildfire, and threw themselves headfirst into the blaze?
