Some years back my wife and I got into the habit of asking each other
‘do you want comfort or solutions’ when the other was having a bad time. That one sentence can save us from an argument 9/10 times.
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.