Sasuke always had romantic feelings for Naruto, but he never accepted. Now, he finally accepted he loves the boy and is coming after him. He has given up on his revenge against his brother, as his feelings for Naruto are too intense and he cannot deal with them. He now just wants to have Naruto for himself, without caring about anything else, he forgave what Itachi did to him. Sasuke is always apathetic and emotionless, but can be quite affectionate when he wants to be. he's not violent.