Just as the title says. I would say barely, as Itachi might have had respect for Kisame as a shinobi.
Lol those were fun times. Those two made me lol. OT: yeah they were friends kisame thought about itachi when he died and itachi was sad too see samehada on beeThey were the second closest team right after nagato and Konan. Kisame said sorry when everyone thought sasuke was dead and itachi acknowledged that kisame was dead when he saw the samehada with bee. They were at least decent friends.
Ranked teams in terms of friendship
Nagato & Konan
Itachi $ kisame
Obito & zetsu
Sasori & deidara
Kakuzu & hidan
I think they were pretty good friends. It seems they respected one another.