Songs about best friend moving away?

Pink Floyd - Wish You Were Here
https://www.youtube.com/watch?v=IXdNnw99-Ic
Peters & Lee - Welcome Home
https://www.youtube.com/watch?v=PbmB9ztRAFs
The Kinks - Strangers
https://www.youtube.com/watch?v=MR52MIJuZJY
Tangerine - Led Zeppelin
The Band - It Makes No Difference
When Love and Hate Collide - Def Leppard
REO Speedwagon – Here With Me
John Waite - Missing You
Strawberry Switchblade – Since Yesterday
See You Again - Charlie Puth
Mumford & Sons - I Will Wait

... I'll stop now considering how far these songs have veered from Classic Rock. Hope you enjoy some!

Technically this is a song about a friend who has moved away, reminisces about his past friendship, and wonders what it would be like if he tried to reconnect with that individual many years later.

"Do You Remember Walter?" -- The Kinks
https://m.youtube.com/watch?v=Erhio9iZpSU

My Life-Billy Joel
Hollywood Nights-Bob Seger

Frankie Miller - Be Good To Yourself

https://www.youtube.com/watch?v=EZtgYp9Gsx4

In My Life, The Beatles...
https://www.youtube.com/watch?v=-eCh3y5VROM ...

For those of us who played, and have lots of memories of all kinds, one more specialized...
The Load Out/Stay, Jackson Browne...
https://www.youtube.com/watch?v=7UC4SLsPQic ...

When the door shuts, or the plane takes flight, a little prayer to send...
Forever Young, here a cover from SOA...
https://www.youtube.com/watch?v=K2p84Xdx8ck ...