It’s a miracle that any of us ever fall in love to begin with. You both have to be head over heels at the exact same time—without moving too fast or too slow. But if you’re in a one-sided relationship, which is when one person is more invested than the other, a romance can begin to unravel. Is your partnership rock solid, or is there a major unbalance that could cause you to crash and burn? Take the quiz to find out.