Sasuke was driven by his hatred when he decided to end his friendship with naruto and to give up being a ninja of Konoha. He decided to pursue on his plan in killing his brother for his brother killed his whole clan, leaving sasuke on the brim of hatred and darkness. Sasuke made a pact with Orochimaru for him to become stronger than Naruto.
the story is becoming a bit complicated and now,Sasuke is very confident to attack Konoha and even kill his ex-bestfriend, Naruto. Though he is very repulsive and hard-headed, he seems to have a good heart, especially when he learned about the true nature of his brother.
Sasuke have been able to discover new powers and techniques that made him so powerful that he was able to defeat the eight-tailed beast. And he only have one more person to deal with, the ninth-tailed beast Naruto. Had Sasuke completely forgotten their friendship?
I am really a big fan of Naruto and Sasuke and I hope that the story will end in a way that they would be reunited and become close friends again and that nothing can ever come in between them.