Live and Let Live?

What ever happened to the I live my life and you live your life rule....Under such circumstances, wouldn't all, if not most people be happy. I don't seem to understand. If one is a true Christian, and does not wish to have homosexuals marry, don't you think you shouldn't be getting married to a member of the same sex.? That seems logical, does it not? Why must you complain about the lives of others, and try to control them. This is not a religious issue...especially to us non believers, it is a legal issue, which is why the constitution must be upheld. We are not a theocracy. Your religious rules apply to YOU, not ME.