Why itachi dies?

Answer 1

"what respects to sasuke, I believe that itachi was sasuke's BF, not naruto... naruto just replaced him "is new BF", it`s quite different and sasuke get it all in their batle, that his hatred that he had, was all a disire of a revenged love, and remember that same words:

"My foolish brother, if you want to kill me, despise me, hate me and live a loathsome life, runaway runaway, and cling to life, and them some day,when you have same eyes as i do, come before me."

A ridle that is important to sasuke roll, a wakening for some of this new and future events, the history are this same words

"tight bound with his older brother" his real BF`s so when sasuke defeated itachi, he fulfilled his requirements for MS.

On top of that, itachi passed on his eye techniques to sasuke to further give him power to protect konoha IMO"

Last itachi`s words and madara future event

That explain`s the fact that sasuke don`t need the eye`s for nothing, because it`s best friend was itachi`s all the time and not naruto as all the ppl thought, therefor the eyes will have a second roll for madaras or anything ploted against it, correct me if i`m wrong :P

Itachi`s char was not bad buried, was a important clue and event to sasuke future

Well done naruto directors, continue the good work, R.I.P Itachi´s shippuden 138