If the Supreme Court was my shepherd I would be in extreme wanting today. Fortunately my moral and ethical framework is not, and never has been, a function of our country's Supreme Court rulings. I began working out my ethical-theological viewpoint on same-sex issues back in 1981. I have occasionally presented my position on this blog, and in a number of other venues. See:
"Same-Sex Marriage Is Not About "Rights""
"Same-Sex Marriage Is Not About "Marriage Equality," But About the Definition of 'Marriage'"
Christianity Today has a helpful article which I'll post in full - "Here We Stand: An Evangelical Definition of Marriage: Nearly 100 leaders respond to Supreme Court legalizing marriage."