Friends are a multiplier for life. Having two friends is more than twice as good as having one friend.
Take something as mundane as gardening.
Just you gardening means (say) 6 hours work on a Saturday.
Add a friend, and here’s what happens:
2x work hours for every hour. That’s the obvious one.
Work for longer, because you’re working together.
Get some things done faster because some things are easier with two people. Like unloading a trailer at the dump, or pulling out a tree stump.
Get some things done you wouldn’t have because either it requires to people, or you just wouldn’t have thought of it.
Access to tools, vehicles and knowledge.
Have more fun.
Sure, this doesn’t always apply, or it applies up to a point, but if you can identify the areas of your life where mates. have a multiplier effect, you can really get some stuff done (and have a good time).