Caesar thought that Brutus was a friend and he was on his side, he didn’t really know about Cassius. Cassius had shown him some ways before that Caesar was unsure about. Once everyone decided to kill Caesar Cassius was the one who was ready for it but not so ready. Caesar never thought that Brutus would kill him and Brutus was the one to do it last. Cassius wasn’t worried about Caesar’s death he was relieved that it it was over to the readers it seemed. Brutus knew that something would happen to where they would see Caesar again.
