Once I get to know them, really know them, then I come to love them as friends and buddies.
I once heard from a friend that the exotic is erotic. Various times I've talked to super attractive guys I've had crushes on and as I talked with them and found common ground I saw them less as objects of desire and more as brothers, buddies, and friends. Once their mysteriousness went away so did the crush and in most cases I ended up with a good solid friend in its place.
Although Chris Evans will always be my man crush......what a man!