On reflection, I'm not sure I have a 'gay crush' at all.
I have no problem with pointing out that a man is attractive, and I never feel the need to qualify my observation with the prefece of "I'm not gay but ..."
But saying that a man is attractive is not really the same as saying that he is attractive to me.
So I would wish to amend my initial response, on the grounds that I think Mr Stevens is a very attractive man, but he doesn't induce any unconcious hormonal responses in the way that my ever-increasing list of female crushes does.