When you've carefully checked all the facts and your attitudes and still find that there's "just something" about your supervisor that's causing a problem in your relationship, you should suspect that
a. too much socializing is going on.
b. you're not carrying your own weight.
c. there's an imaginary risk.
d. there's a hidden attitude.
I think that the best answer is that d. There is a hidden attitude: the remaining options are either connected to your own attitudes, which you checked or would not necessarily cause problems, such as option a.
