How?
And for that matter, how does legal gay marriage affect you? I'm guessing you are opposed to that, too.
That would affect everyone.
Actually I am. However it has nothing to do with religion, hate, or any of the other crutch arguments that the pro side usually hurls. On the other hand, I do believe that there are many rights, etc tied to marriage that ought not be. The thing we need to do is attach those rights where they belong and remove them from marriage. In reality, what is desired is the rights not merely the title. People are free to call themselves whatever they wish.
I've discussed all of that ad nauseam, no need to get into that long protracted debate again (unless you really want to). You are free to believe as you wish and I sincerely hope that whatever your beliefs are make you happy.