Thinking about this scene makes me sick sometimes because casual watchers will ask "but why? Why would Will even forgive him for what he did."
no you don't get it.
Its because his love for hannibal surpass everything that happened between them. yes hannibal is a dramatic manipulative, toxic asshole & hurt will so much but thats also have become their love language with each other. they bite & tear at each other as a way to show their love.
No matter how unorthodox his therapy methods were, hannibal only wants will to embrace his true self & yeah will tried to kill hannibal multiple times now but thats his way of trying to also push away the darkness inside of him.
Will's murder attempts are him trying to kill that darkness because he thinks that killing hannibal will end his inner battle between good & bad & in turn make him "A Good Person" when in fact he never was, even from the beginning of the season. (i.e him having absolutely NO remorse for killing hobbs)
Will's forgiveness here is saying how he misses his friend, how he's starting to accept a small piece of his darkness as a part of himself, how hannibal was right, how sorry he is to betray him, how he wants hannibal to come back home, how through it all, he doesn't think he can just pack everything up in a box & shove it deep within his subconscious & just move on.
All his affections for hannibal & their fucked up version of friendship means too much for him, he doesn't know if he can survive a life without hannibal anymore because don't you see?
whatever their souls are made of, his & will's are so ingrained & twisted with each other, separation has felt like losing a part of himself.
