Here are 4 Bible verses about romantic relationships from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Genesis 2:18 KJV
And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.
Ecclesiastes 9:9 KJV
Live joyfully with the wife whom thou lovest all the days of the life of thy vanity, which he hath given thee under the sun, all the days of thy vanity: for that is thy portion in this life, and in thy labour which thou takest under the sun.
Leviticus 20:13 KJV
If a man also lie with mankind, as he lieth with a woman, both of them have committed an abomination: they shall surely be put to death; their blood shall be upon them.
Leviticus 18:22 KJV
Thou shalt not lie with mankind, as with womankind: it is abomination.