First I wish you happiness, and you do have a right to be happy!
Your happiness would be more complete if society at large accept
you as you are, not just your friends! I am not going debate
whether it's your choice or you're predisposed! But the fact that
you go down this road, there will be issues in any path you take!
Take accountability for your life. Am I against you(or your lot)?
No, just pointing the issues that you'll face! Also, do you think
I've much of a choice whether my son or daughter will turn out to
be gay or lesbian?
Of course you are against the idea of gays using the term
"marriage", you think it is exclusive to you.
I would encourage gays to get married (such as in a foreign
jurisdiction, we have many gay expat couples here, and some local
ones) and to use the term. The lawful bonds of marriage will apply
to you, just that ROM will not register you, so go overseas. No one
can stop you. And like I said above, in Singapore, a registered
civil union is a marriage.
If people like this say the word is not for you, pay them no
heed and carry on.