Honestly, right now the friends I spend by far the most time with all live in my building and we met at events or parties thrown by other residents.
Proximity lends convenience, so we can have morning coffee or go to the gym/yoga together or have a drink nearby on a moment's notice. And spending time together in and around your home does make you closer. They are all great people, but my best friend in the world lives several states away and I see her pretty infrequently.
Vanessa N answered in