There are all sorts of signs that you've found a best friend. Perhaps the most important is knowing who they are. After all, if you can't explain what type of a person they are, then what kind of a friend are you?
The best part of having a best friend is knowing they always have your back. They'll do whatever they can and go out of their way to lift your spirits. Even if it includes strapping a mind-control device to your head and forcing you to listen to "Happy Happy Joy Joy" on repeat.
It's easy to drift apart from even your closest friends once you have children. However, the best of best friends knew how large of a family they wanted to begin with and are prepared. Your friend's kids may have to compete with you over their parent's affection.
7. If Their House Caught Fire, What Would They Rescue?
BFFs know the most mundane details about each other. For example, I know that if my greatest pal had to go in to save something from a house in flames, he'd save his comic book collection, WWE replica championship belt and our friendship bracelet. Hopefully the fire department or a super hero can grab his girlfriend.
Hopefully you not only know what they love, but you both share the same passion. Nothing worse than a supposed bro not spotting you properly at the gym because their mind is elsewhere. Get your head in the game, dude!
Again, shared interests is a large part of connecting with another human being. You share passion not only for real life things, but fictional ones as well. After all, we have such limited time on a seemingly careless wet rock, so we might as well be entertained with each other for as long as possible.
Do you and your best friend having matching tattoos? Are they of "Weird Al" Yankovic filling in for Freddy Mercury in Queen? Then you have a best friend for life, and you know the answer to this question.