The Golden Age of Greek literature preceded Alexander, and so obviously most of the renown authors would not have written anything about it. From Roman sources (and a couple Hellenistic writings) it's rather clear what the relationship was thought to have been, and the basic modern Greek counter-argument is that it's nothing more than hearsay. It's a fairly silly dispute which could be brought up about most any ancient records.
The Greeks just don't want to admit that their ancient forebears were mostly bisexual sluts..
You know why. It has nothing to do with history or historical accuracy. It has everything to do with trying to convince the American peeples that homosexuality is pretty common and that one of the greatest conquerers in the history of the world was gay, proving that gays are tough, warlike MEN.
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.....