Well, I never have seen or heard of a lesbian friend that a man confides in or whatever. It might happen, but not often. I’ve seen the male gay best friend thing multiple times.
Freegards
I have never heard of a man confiding in his LBF.
My daughter had to learn that all of her straight male best friends usually had ulterior motives. One day she came home from school and told me she needed a gay best friend. Her current male best friend started putting the moves on her. I had to laugh when she told me that. I think she learned something about straight boys that day.