There is a sort of legalistic view that misunderstands and, therefore, misapplies the doctrine of predestination by failing to allow for human agency. It turns out to be very close to fatalism.
I’m talking about the sort of teaching that says, “Well you’ve got to find the right girl (fellow)—the one God has for you. If you don’t, you’ll be in misery the rest of your life for having missed out on “God’s perfect will” for you. You will be saddled with a second rate existence as the result.”
You see, there just isn’t any such thing in Scripture as “missing out on God’s perfect will.”
God’s decretive will is always accomplished. And it is established by the use of responsible, human agency. Sure, many Christians make bad choices about their life companions—and some do live in misery. But they are not “stuck” in some lesser-than-best situation about which nothing can be done to remedy it!
No genuine Christian is doomed to live on some sort of a second level existence. There is always the possibility for change through repentance, sanctification, and the blessings that accrue from it. If I didn’t believe in such possibility for radical change, so as to turn bad choices into good outcomes by the grace of God, I wouldn’t have counseled anyone. There is no perfect one for you—the options are always there so long as the other persons considered are genuine believers.
But even then—if one happens to be married to an unbeliever (not a legitimate option) God, according to 1 Corinthians 7, can save and transform the unbeliever. And if He doesn’t, a repentant believer, living according to the Word of God, can lead a joyous life.