Oh wow. Exactly when did it become someone's constitutional right to marry whoever they want in the United States? I must have missed that amendment.
I'll make a deal though; if the democrats who are generally out at rallies campaigning for LGBT "rights" want to attend a few NRA rallies in support of an actual constitutional right to bear arms that is under constant attack by their own party, I'll believe that you care about about rights. Doubtful. What you actually care about is your personal values, and sometimes that conveniently lines up with the rights you think are granted to you by your government.
In 1868 with the ratification of the 14th amendment (specifically the Equal Protection Clause). It doesn't specifically guarantee that everyone has the right to get married to anyone that they want, just that everyone must have an equal right to marry anyone that anyone else does. So a state could get rid of marriage altogether, but if it allows it at all it must allow everyone the same choices of who to marry that it allows anyone else.
