It means no to cross the line. I hope this helps you :]
1) <span>"Maybe she left because she's mad at me... or do you think I'm overthinking things?" asked Robbie.
2) Quotation marks should be used around the speaker's actual words because it is a punctuation of speech.
3) Slowing the action is NOT a reason to use dialogue in a story. When a character talks, it adds personality to a character and tells us more about what is happening.</span>
