Plutarch's Lives' chapter on Alexander only includes an anecdote where an angry Alexander rebufs a conquered city's presentation of a young boy as a 'gift'; Alexander's father Phillip is supposed to have remarked, at seeing the bodies of the famous gay Theban garrison after his conquest of that city, words to the effect 'let it not be said that any of these (warriors) ever engaged in any unspeakable acts' - ie. he admired their courage and fighting skill, and refused to acknowledge that they were homosexuals.
Doesn't sound like they admired this sort of behavior....I too have yet to see an actual cite to a contemporary source claiming that Alexander was a deviant.....
Plutarch states directly that Hephaistion "was" Alexander's - as one would speak of a mistress - whereas Craterus was merely the king's friend.