It's oxymoron because it is including the word "fearful." Fearful is describing bravery.
Yes, you should put a comma.
A comma is usually used in the middle of a sentence to separate two clauses, or right before a conjunction. Since “like” is a dependent clause in this sentence, as “it can be attractive” can stand alone, a comma would be put before it. It may also help to read the sentence and see if there is a natural pause to it.
A. He becomes mentally tortured by his actions
When he says "My will to her consent is but a part; An she agree, within her scope of choice Lies my consent and fair according voice." He is saying here that his consent to Juliet and Paris' marriage is "but a part" of the decision, so he believes that her choice is also needed. He says that, while his "consent and fair according voice" may play a part in her choice, she still has a choice, free will.
