Paul made it very clear that for New Testament Christians (you and I) that marrying was a choice. There is not a hint in Paul's Teachings about it in 1 Cor 7 that one would be "turning down" God's choice for them or rejecting God's will for them if they chose to remain single and serve the Lord undistracted.
There is no such thing as "The One." You make them "The One" when you say your wedding vows.
So choose wisely. You don't get to say "They were not "The One" after you discover that they are one of the most miserable people anyone could ever possible live with.
I agree with the general sentiminent, but I would also like to point out that 'wedding vows' are a cultural construct, not a Biblical one per se. Jews had their own customs. Standing in front of a priest and a crowd reciting words intended to show to consent to marry with rings on the ring finger was a Roman practice, done with a pagan priest before the practice was Christianized. Biblical practice involved the groom giving a bride price for virgins and a custom of having a feast at some date and taking her home with her. By the time of the New Testament, Jews had a custom of having a kind of written contract and a bit more elaborate dowry customs, providing a dowry that stayed with the woman. Some Bible interpreters project post-exhilic dowry practices back into pre-exhilic times. That might be legitimate, or it might not.
Saying 'breaking wedding vows' is grounds for divorce, as I have read in discussions on marriage in online forums, can be inaccurate and misleading. For example, if a wife says, "I don't feel cherished enough. He isn't cherishing me like he said in the wedding vows' is not Biblical grounds for divorce. Maybe he needs to repent and there needs to be reconciliation. If she took the older Anglican wedding vows and does not obey, she needs to repent for violating her commitment and scripture, but that does not mean he is free to divorce her for breaking her vow. Breaking vows is one thing. Divorce is another. And many of the 'wedding vows' are not technically vows. I have heard the word 'swear' used in RCC vows, but Protestant vows are often in line with 'let your yea be yea and your nay, nay' since neither are compelled to swear and oath. But marriage is still binding based on what has been revealed, apart from our adding extra oaths on top of that.
It is funny how most people who are not happy with their mate think "Oh no.. they were not "the ONE" .... instead of "God gave me The One and now I have to learn to love them for who they are. Their ideas about God having "the one" just for them change so quickly when "The One" turns out to not be their fantasy.
I heard a Sunday school teacher, when I was a child, say that he believed for every man there is one woman, just like God made Eve for the one man Adam. Thinking about it later, he was wrong. Widows and widowers may remarry. Back in the day, a man might marry a 19-year-old who dies in childbirth. Then he marries a 23-year-old the next year. Both wives were alive at the same time. They couldn't both be 'the one.' And 'the two' just doesn't sound right.
But if you do pray for God to select the perfect woman for you and ask Him to bring her to you and show you who she is, and it happens, in a sense, you might think she is 'the one.' If someone prophesies over you, genuinely, that you are to be married when you have already planned to proposed, then you still have to be faithful, be a good husband (in my case as a man), etc. My wife still has to be a good wife. If God provides a spouse for you, and you mess it up, you shouldn't blame God for the other person not being 'the one.' (Some prophesied over us about us going to many places and ministering to many people, not explicitly about marriage, but it was implied we'd be together, after I'd prayed through on it and was convinced that this was the right decision and made arrangements to shop for a ring.)
In the end they discover that they were indeed choosing all along, and they are ready to choose all over again, but this time they will say that one was not the One but this one is the ONE. They don't learn, they keep believing in the fantasy that there is "The One" and they just have to pay closer attention to the miracles that bring them together unless they MISS THE ONE that was meant for them. It gets so stupid.
I suppose it depends on what they mean by 'the one.' If they mean 'the one' God has for them, then going from one person to another declaring each to be 'the one' is rather foolish.
Stop believing in the fantasy about THE ONE and just make a wise choice.
Are they nice all the time?
Do they save money and stay debt free?
Are they smart and like to study the Bible?
Do they spend their lives serving Christ and helping others to know Him?
Things like that.
Notice the things you would find hard to live with and don't ignore them.
Things like filth, slobbiness, these are flashing signs of an inward condition.
Do they spout really dumb, unbelievable, irrational conspiracy theories? These types will make your home a house of horrors.
Are they too emotional about everything, good and bad? Could be a sign of BiPolar which will result in more negative emotion than postive once you live with them. And these things are rarely cured so no what you are signing up for, because you don't get to say they were not "the one" when you get tired of the emotional drain after 10 or 20 years of it just getting worse every year.
They with all their negative issues will be THE ONE when you make those wedding vows.
Read 1 Cor 7 again and believe that Paul meant exactly what he said even if it is not going to be a good Hallmark Movie.
God can direct specifically through putting something on someone's heart, through the Spirit speaking, through dreams, through visions, through prophecy, through other means, and he can also answer prayers for wisdom and direct the paths of those who trust Him instead of leaning on their own understanding and who acknowledge him in all their ways.
I have a recent post on this in the decision-making thread in the Bible section of CC.