People get busy and life has dramatic ups and downs, but if you watch Drag Race every Friday together or bake Betty Crocker cookies every month, you have something to anchor you through the chaos of life.

It’s good to have “your thing”

Unless something truly terrible happens, there’s no room for grudges. You will annoy each other, of course, but it’s always better to get over it quickly.

Fight like siblings

If you start every conversation with, “Hey, remember that time when… ?” you and your friend will die of boredom.
You need new things, new memories, rather than using nostalgia as the glue holding a friendship together. Living in the past can make you both feel emotionally stunted and a bit stale.

Nostalgia is overrated

It is key to maintaining real relationships. Turn up, because you know they would do the same for you in a heartbeat.

Commitment

Friendship is not a monogamous relationship; there is room for more than one. When you’ve known someone for years, try to be confident in the bond you’ve got.

“Best friend” is a tier, not a person

Adult friendships can be tricky. They're not as fragile as the friendships of the teenage years, when something as simple as your pal going to Starbucks with someone else can shake your relationship to its foundations; but neither is it like primary school, where you can just go up to someone in the playground and decide you are now best friends for ever.