2. Macbeth wishes Banquo was there because he is seeing his bloody ghost.
Explanation:
Based on this particular scene from Shakespeare's Macbeth, Macbeth is haunted by the ghost of Banquo who he murdered in the presence of guests and he begins to act strangely. He regains his composure and makes this speech, toasting to Banquo and saying he "miss" him and wish "he were here".
The irony here is that Macbeth is tormented by Banquo's ghost but makes a speech saying that Banquo was missed and it would be much better if he were there.
