The lack of reciprocation is a tough one. I think it also helps sometimes to understand that not everyone is good at being the mother goose or the facilitator, especially if someone else is already good at doing it, and it's not because they lack interest or don't care.

I have some friends who very easily lose themselves in their work and the stress around it and if I wasn't the one checking in and basically pulling them away, I'd miss out on what are easily my favourite days out and it has no impact on how much we enjoy each other's company. Maybe one day it changes but until then I'm there for them.

That said, there are of course times where it's better to just let go. But those people were probably never that important to you in the first place.