And their choice in who they spend their lives with doesn't change the definition of the word marriage.
The problem with your argument is you think your church has the final say regarding the definition of marriage. It doesn't. All churches are equal according to American Law. Therefore the definition of marriage is open to interpretation. American law now recognizes marriages of same sex couples and there is nothing your church can do about it except to continue to discriminate.
There's nothing wrong with a church discriminating by the way. They've been doing it for millennia and I don't see it changing anytime soon.
The only thing changing about religion these days are less and less people believing in religious bullshit.
...and THAT is why more and more people will burn in hell.
LOL. If God loved everyone, he wouldn't punish them by having them burn after they die.