What are the main characteristics of the relationship between Brutus and Caesar ( i.e love, trust, betrayal etc )

After Caesar's death, Brutus states to the people that he
loved Caesar, but his love for Rome was greater. In Act Three, Scene Two, Brutus states
his love for Caesar:

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If there be any in this assembly, any dear
friend of Caesar's, to him I say that(20) Brutus' love to Caesar was no less than his.
If then that friend demand why Brutus rose against Caesar, this is my answer: Not that I
loved Caesar less, but that I loved Rome
more.

Likewise, Caesar loved
Brutus according to Marc Antony. Caesar called Brutus is angel. These of course are the
words of Antony in the funeral speech of Act Three, Scene
Two:

For
Brutus, as you know, was Caesar's angel.
Judge, O you gods, how dearly Caesar
loved him!
This was the most unkindest cut of all;
For when the
noble Caesar saw him stab,
Ingratitude, more strong than traitors' arms,(195)

Quite vanquish'd him. Then burst his mighty
heart,

To really understand
the relationship between Brutus and Caesar, one must analyze Caesar's last words. As the
conspirators are stabbing Caesar, it becomes Brutus' turn to stab. As he approaches with
his dagger, Caesar says, "Et tu Brute? Than fall Caesar." Even Caesar trusts that Brutus
is an honorable man as he stabs him. Caesar is saying that if Brutus is in on the
conspiracy, then Caesar should die. In death, Caesar loved Brutus. In fact, Caesar is
saying that he should fall or die if Brutus feels the need to murder him. In Act Three,
Scene One, Caesar's last words are:

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CAESAR: Et tu, Brute? Then fall, Caesar!
(85)