I guess I don't have hard evidence. But here's a statistical game I like to play:
Suppose that 0.0001% of the US population - a vanishingly small amount - could produce that "spark" for you, and are actively looking for someone. That's about 33,000 people. There's about 20,000 cities and towns in the US, according to Google, so on average, there's between 1 and 2 people in every city in the country who are the right person for you. And people move around, and a big city probably has proportionally many more people than a small town.
So if OP lives in a city with a million people in it, maybe there's 5 or 6 or 10 people who are the right fit. But they're looking, and so are you... so it's just a matter of time.
Like so many other things, it's just a numbers game.
