For one, if love wasn't pleasurable, then we'd have no urge to reproduce. We'd all die out.
Second, if you don't like gays, ignore them and stop attacking their beliefs and such. You don't just jump into a middle of a loving couple and say "this is wrong, stop it!" You shouldn't do that to gay couples either. If they want to be with eachother and like eachother, by God, let them.
Third, how the hell are they hurting society? If you don't like it, don't pay attention to it. It's like saying some style of clothing is hurting society. As far as I know, gays aren't making the economy fluctuate. They aren't causing huge wars or continental annihilation. We're all still alive and we're going about our lives, even with gays in the community.
I say just let them be. Jesus. If you believe they're going to hell, go ahead and believe that. You aren't, so you shouldn't give a stuff about them.