How to know if you've found "The One"

Sometimes articles with titles like "How to know if you've found The One" pop up in my newsfeed. Sometimes I read them out of curiosity. But they never say what I wish they said, which is this:

How to know if you've found The One:

First of all, what does this even mean? There are billions of people on this planet. Chances are there is more than one person with whom you could happily build a life. So relax. Second of all, stop reading this article. You already know the answer to your question. You know if you're in a relationship that feels right or if you're in one that doesn't. It is glaringly obvious. Maybe you don't want to accept it or maybe you are reluctant to face the exciting/scary/hard decisions in front of you, but you definitely know. And if GI Joe taught us anything, it's that "Knowing is half the battle." The other half is doing, which is decidedly harder. But hey, you're at least halfway there. You've got this. Lastly, there is one surefire way to find someone you want to spend the rest of your life with. And that is to be that person yourself. The one person who is guaranteed to always be there with you is you. So if you want to spend your life with someone who is happy and healthy and adventurous and kind and funny, work on being those things yourself. By all means, find your people. Meaningful relationships are the best part of life. But forget all that nonsense about finding someone to "complete you." You're already complete awesomeness.

Lyric of the moment: "Nothing lasts forever. Some things aren't meant to be. But you'll never find the answer until you set your old heart free..." ~The Oh Hellos "Hello My Old Heart"