You may not like sodomy and I may not like sodomy. But a constitutionally free republic allows people to do things others don't agree with if it doesn't interfere with another's freedoms. It's not a perfect world, but our free constitutional republic is the best political thing the world has ever seen.
So you support gay marriage, as long as the states do it, and your participation in the political argument is to choose to fight conservative efforts to protect marriage.