The story of Jonathan and David is probably the best case for a gay loving relationship in the bible. It still takes a little interpretation to say it was or was not a sexual relationship. It certainly sounds like it was to me but it doesn't exactly say that.
There are a few verses that are clear. But they are few. There's a lot more about greed, selfishness, stealing, than there is about homosexuality. Maybe we should have the same priority the bible has. It does seem the bible condemns it, but it is clearly not a priority as far as the list of "sins" goes.
I wish we as a culture would pay more attention to what the bible pays more attention to. :)