If so, a reading of Romans 5, among other passages, indicates we are indeed saved by faith and only faith in Christ.
We are saved only by faith in Christ, but not by faith alone. If you read all of Romans you will see that his argument about faith and works is the same as that in Galatians, faith without the works of the Mosaic Law. But let us leave that for now since we are already occupied with Galatians.