Marriage: State vs Church

I honestly think the church needs to take back marriage from the state. This harmonizing of two is what has now got the country up in a stir about gay "marriage". If the church were to take back marriage that would leave the state with civil union. So under this proposal a Christian couple would have to go through two stages, one with the state (civil union: legal in state, probably just some paper work) and the second in the church (the actual marriage). This would solve the gay "marriage" issue because then the church's ceremony would not be legally binding in the state only in the eyes of God which I believe is the way it was meant to be leaving the gay couple to be legally civilly united(?) in the state. Just to be clear to be legally "married" now would be called civilly united, you would have to go to the court house and fill out paperwork and have the justice declare you civilly united and then to be married in the eyes of God you would still have the church ceremony. The major problem I see with this is having to change terminology. Non Christian couples would no longer be called married but civilly united (or something to that effect) no matter their genders whereas Christians married in the church would maintain the married label. (please comment, but keep them civil this is for discussion purposes, if you disagree be civil about it, I will reply if need be)