Give it up. I think she might be a little hesitant and uncertain at first, but after time consideration, she still felt that she was not together, so she said an academic reason for refusing. It's not like you're absolutely right. Some people, though seemingly speaking, look very thin, but in fact they already have a feeling of your point of view, or the feeling of speaking, which is not very common. I just didn't say it to my face at the time. Since it is not suitable, let's find the right one. Don't bother.