From my daily devotional today:
Here in Acts 16, Paul found a friend like that–Timothy (v. 1). Timothy was younger than Paul so it was more of a mentor-relationship than a peer-to-peer friendship. But at the end of his life, Paul wanted Timothy with him (2 Tim 4:9-13). That’s a great friendship.
https://pastorbrianjones.com/2020/05/12/acts-16/
Do you have a friend like that? Have you served with someone and, in the course of serving, became close to that person personally?