Over the last 3 years, 2 of my good friends have moved over 100 miles away. One to Cambridge and my really good friend to near Stamford. I just really miss them so much, especially my friend in Stamford.
We keep in touch with phone calls and WhatsApp, but it isn't the same, just miss our regular meet ups for coffee and lunch. I am going to stay with her in October for a few days!
It does seem harder to make new friends once retired, and when joining groups, there always seems to be cliques that you need to break into.
I have my partner and family, so I count myself lucky in that respect.