Question

What do you understand by that every like is not the same,O caesar, the heart of Brutus yearns to think upon

Answer 1

because Caesar trust Brutus too much and share the views.

Answer 2

Julius Caesar believes that Brutus is his friend. But the truth is he is one of the conspirators taking part in Caesars assasination. Brutus says this because his heart grieves when he thinks that he is "like a friend" of Caesar. He understands that there is very much difference between a true friend and "like friend"