I know it is becoming a Psychcentral cliche, but show her this post.
At worst it will confirm what you fear anyways, at best she may be surprised how she is coming across.

My T is very attractive and I was wary at first of seeing someone like that. I felt that he would automatically hate me for being someone who struggles with fitness and health. That is "my stuff" coloring the situation. He has actually turned out to be pretty caring.