Opinion or feeling?
The statement, "I feel that you have been unfair with me" does not express a feeling. How do we know? Just substitute the words "I think" for "I feel."
"I think that you have been unfair with me" is more accurate because what is being communicated here is an opinion or thought, not a feeling.
Does the following statement convey an opinion or a feeling?
I feel cheated.
Next: The vulnerability of feelings