Jeez, Louise .......... what a macabre group you old guys are
To paraphrase a bumper sticker: you don't stop doing the things you love because you get old -- you get old because you stop doing the things you love. When you start feeling the way you describe, it's time to re-invent yourselves. Time for a quickening. Time for a motorcycle ride. Time to go howl at the moon with your buddies, even if your buddies are dogs.
I took a lesson from these lines which I had to memorize in high school English class (do students still memorize poems? if not, it's a damn shame):
An aged man is but a paltry thing,
A tattered coat upon a stick, unless
Soul clap its hands and sing ..... -William Butler Yeats
Do not go gentle into that good night.
Rage, rage against the dying of the light. -Dylan Thomas
I refuse to get old because it would mean having to give up my toys .... and I do love my toys.