It’s not common, but it does happen. Friendship turns long-term. It goes beyond usefulness and conveniences. Something deeper gets transferred between the two in a healthy manner.
No apparent need is fulfilled except for that deep inner sense of connection. It’s a God connection that’s hard to explain but a sure reality. Yet it needs to be cultivated and nurtured just like any other relationship.
Proverbs has words of a similar tone:
“Better a neighbor who is near than a brother who is far away.” (Proverbs 27:10c)