I am very lucky in that I have friends who I love, but are geographically widely spread. Most of these friends I met at high school or university so we catch up every few months between busy jobs/kids etc. I have one friend near where I live that I met back when my DD was a baby, I have just returned from living internationally and having a bit of a hard time settling back down for lots of reasons. One thing that has been suggested to me is to 'make some new friends' to help feel settled, (as well as keeping the old!) so I have a bigger network here. I can see this is a potentially good idea but my kids are getting a bit older so I"m past the making friends at kid groups kind of things.
For sport I'm not good at a team sports sadly, I love to swim and do so but this is quite solitary. I am a musician by trade and do this all day so I'm not that keen to join a choir and do yet more music! I'm in my mid 30s and live in the South East if that helps with any suggestions! I'm not miserable and friendless and I count myself lucky that I have some fabulous friends, but local friends not so much and I can see that it might help me settle down a bit and not hanker after leaving the country!