Conventional wisdom says "relationships matter most in life" and then conveniently leaves out that your relationship with yourself is the greatest predictor of your relationship with others.
Instead of asking "Are you the one," ask two questions of each of you. Do I accept my partner despite their shortcomings? Do I commit to nurture them to achieve what is important to them? And likewise, do they accept me and do they commit to me? All you need is four yeses.