I think you know better than that. If I didn't want gays to marry, I'm pretty sure you'd know it.
I'm just waiting for something better than your "doesn't affect you", "makes more people happy" and "doesn't infringe upon anyone else's rights" guidelines.
They are as valid, IMO, as tec's "A traditional marriage is a man and a woman." Which I find to be just as poor a reason to be against gay marriage.
Honestly, neither side has a valid reason in support of their viewpoint.