A key excerpt:
In a biblical view, there is not “one right choice” for marriage, but rather good and bad choices. We are encouraged to use wisdom, not destiny, as our guide when choosing a marital partner. There is no indication that God creates “one” person for us to marry. This is because Christians believe that God brings the primary meaning into our lives. Marriage — though wonderful — is still secondary.
Passages from the Bible discussed. Read the whole thing.