""blimey it's fine to be jealous of the OP having a bit of time child free - it doesn't equate to wanting to be single ""
That's what the OP has to work out.
If she is getting used to having child free time, or she wants another adult that she is romantically involved with, to do things with.
There is a big difference.
Keeping busy isn't going to help, if you need the sharing nature of a relationship.
I am happily single, if my friends were more available, I would be happier.
I don't have many adults that I can share things with, that's what I missed when my DH died, even though I've had relationships since, I haven't had that closeness.
I lost a couple of good friends, one through alcoholism, the other I stopped mixing with because of drug use.
It isn't easy to make close friends when you are older.
Most men 45+ are piss takers, so, for that reason, I will remain single.
I'm at a stage were in re-evaluating things.
As said, you need to pin point what you actually want.