I think the Romans viewed homosexuality with some degree of acceptance, but they did not hold it high as an admirable trait as the Greeks may have to some degree. Romans tended to be a harder sort in terms of attitude, and gay loving was seen as excessive. You should be producing sons for the city-state or busy with work as opposed to wasting your time on such things. That was the Republican attitude I think. Later in the empire it was probably much less so. Additionally, though if you were on the receiving end of things (and I care not to explain that phrase), it was simply something of a humiliation for any man who took himself seriously. Caesar and the Bithynian king come to mind.
I kind of think Roman gay love is comparable to smoking pot today. It's largely frowned upon, but a lot of people still do it mostly in secret, in the privacy of their own homes, and few people bother to scorn or hunt it down, seeming largely harmless.