As if you needed further convincing The One is, well, The One...
1. You can't imagine your life without them
Let's start with the big one: no matter how hard you try, you just can't envisage your existence without them by your side. They're the Mickey to your Minnie. The brownie to your cappuccino. The Netflix to your chill. You get the picture...
2. They take care of you, no matter what
Whether you're under the weather or simply fancy a little bit of TLC after a long day, they're there, whether via a reassuring hug, a relaxing foot rub or simply asking 'What's up?'.
3. When you think about your future, they have a key role
Whether it's as father to your children, co-founder of that business idea you've had rattling around for a while or, more simply, as your husband, you know the part you want them to play in the years to come.
4. You know things about them no one else does
That embarrassing gym story? Their thoughts on their boss? The way they like their coffee in the morning? Yup - you know it all.
5. They have other strong relationships
They're not reliant solely on you: they have close family bonds, historic friendships, functional relationships with colleagues and so on.
6. You talk in bed
Your bedroom isn't solely about sex and sleep: rather, you use your down-time to communicate with each other, too. You chat about plans for the week ahead, discuss worries, ponder the future, share recommendations, work out dinner plans...
7. You've seen each other at your very worst...
He's seen you throwing up, sobbing into your pillow, spitting with fury - and always knows how to help.
8. ...And you've seen each other at your very best
They love nothing more than watching you light-up with joy, whether over the big or the small. They're your biggest cheerleader, always - and you're theirs, too.
9. You love spending time together
Whether it's a quiet afternoon at home or an action-packed weekend away, you adore quality time.
10. You can always make each other laugh
No matter how dark your mood, they can always crack you up. Always!
11. You always resolve arguments together
Whether it's a bicker about who forgot to buy milk or a full-on row about finances, you'll always work together to find a solution. (And you always do your best to make-up before bedtime.)
12. You know their back-story
You know everything about their past, including the highs and the lows. No skeletons in this cupboard, thank you very much!