Since I, as the vast majority of the population do, believe that marriage and family is the cornerstone of a well-functioning society, I believe that it is one of the legitimate areas for some kind of government regulation.
There is nothing to stop people from having whatever kind of living arrangements they want.....just don’t have the government sanction it as being on equal terms with a marriage between a man and a woman.
That has nothing to do with the Constitution at all. The Constitution does not carve out favors for majorities. The fact that you and your "vast majority of the population" favor something, means nothing.
BTW, I also believe that marriage and family are the cornerstones of a well-functioning society. But that doesn't change a thing about what I wrote.
You do understand that point, don't you? What we want is not necessarily "constitutional". It's important to acknowledge that.