Answer:
He kept telling her that he was too busy with his coursework to spend time with her, and she clung to the tenuous belief that he was telling the truth, even after she saw him walking around campus with other girls.
Because the rapist had drugged her with rohypnol (GHB), she was only able to give a tenuous account of the terrible ordeal.
She is a supportive friend and a great listener, who will patiently discuss even the most tenuous details and mundane anecdotes I have to share.