Whether you’re 14 years old, 84 years old, or somewhere in the middle, when you’ve found the one, you just know. It’s a combination of emotional and physical responses, where your brain goes into overdrive and your heart pulls a Grinch on Christmas and expands three sizes whenever they’re around. It’s a feeling of friendship and companionship, where you value their opinion, support their decisions and receive the same in return. And each moment is a simultaneous plea for them to never leave and a feeling that the moment could last forever. Here are 12 ways you know you’ve found "The One":

1. When something good, bad or ugly happens, this is who you want to call.

It doesn’t matter what it is, you feel an overwhelming need to share it. They’ll laugh, congratulate or comfort you when you need it most. They're proud of what you've accomplished and grieve when you do.

2. When they’re sad, you’re sad. When they’re happy, you’re over the moon.

You can’t stand to see them upset. But when they smile? Your heart goes somewhere else. Your emotions are just as connected as your minds.

3. When you think of your future, they’re right there next to you in your plans.

You can’t wait to share your next adventure with them. Let's move in together, let's get married, let's go travel the world, etc.

4. You are not shy around them.

Snort while you laugh, complain about the bad food you ate last night or walk around in your rattiest clothes, you know they’ll love you just the same.

5. Sassy attitude or bad mood, they love you even during your weakest emotional moments.

And you would do the same.

6. You cannot say “I love you” enough.

I love you, I need you, be mine forever. Whatever it is, you just want to constantly remind them.

7. You’ve devised a secret language of side looks, eye rolls and winks to communicate in certain settings.

Only you two will ever understand what the other is saying. It's part of your connection. You practically share a brain.

8. You both respect one another’s opinions and have learned to agree to disagree when needed.

Whether it’s financial decisions, political opinions or something else entirely, you will never belittle their thoughts and they will never degrade you for yours.

9. You sleep better when they’re next to you.

You want to hold each other forever.

10. You are practically capable of reading one another’s minds.

You know them and they know you. You know exactly what they’re thinking and when they're not telling the truth. In fact, they may even know you better than you know yourself.

11. Neither of you will ever complain about the other’s company. You enjoy your time together.

It never seems to last long enough, anyways.

12. Above all though, they are your best friend before anything else.

And you wouldn’t have it any other way.