Depending on how you feel, you might want to consider having a talk with select people. Like if you didn't want to let somebody go and thought maybe they felt the same. All relationships are still relationships, after all, and can be navigated roughly the same ways, within reason, obviously.

If you're afraid to reach out and say something like "hey I'm worried we're drifting apart", consider that sometimes people who have kids and families do still want friends, they just lose track of time or focus, and can end up feeling lonely or whatever. Sometimes they just legit stop caring too, though, so, there's also that.

I've lost a few friends in my life, sometimes I've had mutual desires to it not happen, but we both just... Lived too far away and grew into different people. And, I can only put in so much effort when my messages or texts stop getting returned before I feel like maybe I'm bugging them and the ball is (maybe forever) in their court.