I dislike one of my trans friends.
Why do you not like your trans friends?
I don't mean that I dislike all of them, just her, I don't like her.
Well if you dislike your friend just because of her personality and how she is then that is fine. It is not ok however to dislike someone simply because they are trans. That being said, you are not forced to like every person who identifies as trans.
You are making me sound like a racist. I hope she goes back to being a guy.
That's not my intention, and I can understand how you feel about losing your guy friend now that he's so different. What I am trying to get across is that you need to separate gender from the actual person. If she is cool, then like her, but if you truly dislike her based on her personality, then you can let your friendship end.