Why is it that you oppose gay marriage when:
1. It in no way affects you, unless they try to force homosexuality onto you in which case they're in the wrong for forcing anything on to you.
2. The church and the state are supposed to be separate, remember? If you absolutely need to, why not just call it a bonding of two people instead of marriage?
And 3. You shouldn't be able to tell people how to live their lives. Atheists don't believe in a god and you haven't tried to outlaw us, what makes homosexuals different? It's not like they're doing it in public or anything.

Also, I'd prefer it if you didnt just quote the bible or say "cause the bible says it's wrong". I would like an answer that comes from you, not what some people two millennia ago wrote.

What's wrong with a civil union? Seriously, look up marriage in the dictionary. 'Gay marriage' is an oxymoron. See? Not even one biblical reason.