There is no "they"...only Sasuke kills Itachi. And, no, Sasuke is not friends with Naruto.
no because so far in the manga and episode sasuke is bad i'm not saying he will always be evil
Shippuden hasn't ended yet, but so far, no. (Although Naruto still thinks of Sasuke as a friend, of course.)
I'm not completely up to date on Shippuden but in reality I think Sasuke still thinks of Naruto as a friend. Sasuke isn't cruel enough to completely sever that bond.
Yes. They have been good friends and comrades ever since they were at the Academy together or a little later after that. Mikoto was pregnant with Sasuke and Kushina was pregnant Naruto at the same time and they both hoped that Sasuke and Naruto will become friends in the future just like they did.
Sasuke's goal was never to become hokage, but naruto's has. Im not sure if he achieves it, but Sasuke wishes to kill his older brother Itachi Uchiha
there best friends
I think so because before sasuke left he said he considered naruto as his best friend.
There is still a bond between them. Sasuke doesn't show it, but he still cares for Naruto, although he almost risked his life for Naruto in Shippuden movies 2 bonds they work together and fight the zero tailed leech.
yes they are
They are already friends. At least, they have a bond connecting them in some way, according to Naruto. I believe Sasuke feels the same, but he doesn't show.
Since the academy and they still are. Although Sasuke and Naruto don't really admit it. They really are still friends no matter how much they fire off punches.