The Bible says not to be unequally yoked. So, if you are single, you should only date those "of like precious faith." Who is that for you? If you say all Protestant Christians are of like precious faith--or perhaps, Catholics too--then are you willing to become one? If not, if you really do believe you belong to the restored church of Jesus christ, then you answer is right there. Tough to practice, but pretty easy to discern, imho.
"Power tends to corrupt, and absolute power corrupts absolutely." -- Lord Acton