You continue to assert this point, basing it on Loving v. Virginia which found that we could not exclude a man and a woman from marriage. I can't follow your reasoning from that position to the right of same-sex couples to marry.
There are two major problems with simply changing the definition by court order, on the basis you claim. 1) polygamy, short-term marriage contracts, etc. will immediately be entitled to marriage, and the legal "equal protection" right to spousal and survivor benefits, and 2) the Supreme Court will have found another "right" somewhere in the "emanations of the penumbra" of our Constitution. There is no right such as the one you are claiming today.