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.
So the urge to have children that way YOUR GENETICS CAN LIVE ON is nonexistent?
All species have the urge to pass on their genes and help their species survive, it's the organism's mechanism to prevent itself from giving up and dying.
If there was a marriage and you think it shouldn't be/happen. What do you do? You speak up at the altar or you gossip about it to friends until you don't care about it anymore.
And you're right about third thing.
In a sense, it is, as you can choose to deny attraction, though it will probably have adverse effects on your psyche.
Just because you deny it, does not mean that it is not there. Your subconscious screams out to you saying "Listen to me! Why are you suppressing me?" and causes many different negative emotions, like depression (I'm not saying this is the only cause for depression, but it's one of them).