No, of course not.But marriage is a ceremony by the church, and gays definetely should not be able to force the church to marry them, therefor the state must provide them a document which entitle them equal rights. Is my fair interpretation..
But the state should recognize them under the 14th amendment just like they recognize normal marriages and give them similar legal/tax benefits.
As for the 2nd part of your post, what responsibilities do gays not have?Aside from that I think gay relations and the accomodations of such as is happening in our society is completely wrong and utterly ridiculous. As is giving women the same right without giving them the same obligations as men. As in example of countries with drafts where women are quoted into boards of directors, but not quoted into military drafting. Not drafted at all actually. Equal rights should be equal rights, no exception.