2 Corinthians 6:14 says "Do not be yoked together with unbelievers." When it comes to marriage, the Bible says two shall become one flesh and the Lord says let no man divide. God gives us urges and impulses but they are to be guided in the right direction and we must be grounded in our training. We must go to the Lord first when seeking a spouse and we should follow God's word instead of letting our emotions get in the way.