Prussia has three days before the Allies officially dissolve him. Three days to live; three days to say goodbye to his brother; three days to mend their broken relationship; three days to tell his brother that he loves him and that he's sorry. (Not yaoi.)
"Hey West, guess what? Big bruder loves you!" It doesn't matter how much time has past, he can't let go of that dummkopf. Not yaoi.
Something was broke inside him - he could feel it. Like a loose bolt or a snipped wire. He was broken beyond repair, he knew, and there was nothing he nor anyone else could do about it. And now, he had even lost Clarke. "Thanks, Princess." In the end, it was the perfect goodbye for Finn. [Beware: Season 2 spoilers!]