My gf is struggling with this right now.

We're both 32, I grew up in CT, made friends here, moved to Boston for work.

Met her there, we moved in together, cost of living pulled me back to CT, she followed.

I reunited with my friends, as if nothing changed, but now all her friends are still in the Boston area. Ironically, she did have a CT friend she met in college, but that friend of hers LEFT CT I think the SAME WEEK we moved into CT because her relationship ended, so she moved back to Boston with her family.

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Meanwhile, all but one of my CT friends are single so there's not really much room to meet others through them necessarily.
She's also still job hunting so hasn't yet had the opportunity to make friends via work.