How do you deal with isolation? (details inside)

I’m looking for insight on how you deal with feelings of isolation. I’m more or less isolated from my family – immediate and extended (aside from my mum & one brother)
I won’t go into details about family history, but it’s not a situation that’s going to be resolved any time in the near future.
What you do when the feelings of loss and loneliness take over?
I know forgiveness and acceptance of the situation is key.
How can I speed up this process without forcing it?