In reply to Beardyman:
I guess the answer will vary with the individual, but for me two huge parts of climbing are a) the locations/situations and b) the company I keep.
I will always walk in the hills even if I can't do routes; I suspect the people I walk with will be those I climb with now. So many shared experiences - exhilaration and fear; contentment and discomfort.
I thought, when my grades started to drop, that I would resent it. I don't. The wonder of climbing is that a whole vista of new stuff is always there. The one thing I do feel uncomfortable about is the balance of conversation starting to slip in favour of reminiscence over anticipation. I fight this hard and, for the time being, I win.
Of course I envy the majesty of youth. But the key is to find the enjoyment in the red kites wheeling over the local beacon during a weekend walk as much as the condors over my Andean eyrie during a first ascent all those years ago.
You've bust your leg. It'll heal and you'll be surprised by what you still climb. Best grade E3? Do you know how many amazing E2s and E1s there are... and that's assuming you don't get back to form (which is far from a given). You've got a young kid (or stole one for your profile pic) - I suspect that life will fill with even better stuff before you know it. And the friends? They're still there; you're perhaps just ahead of the wave a little.
So don't be too glum; it's far from over!