A thought or two from somebody who should get on with some work
Quitting flying is one thing, modifying what and how you fly is another.
If worried about medical issues (more than the AME was presumably), there are plenty of cheap single seaters out there.
If worried about dwindling cash reserves, fly something cheaper - gliders, microlights or a big syndicate (or a big glider or microlight syndicate).
If worried about limited time, take your grandkids flying!
If you want things done your way, run your own aeroplane, or start a syndicate on the clear understanding that you are in charge.
If you've lost your medical, make friends amongst youngsters who would appreciate somebody of your experience along for the write.
If you aren't enjoying it any more, learn to fly something totally different - however experienced you are I'm willing to bet there are one or two areas of private aviation that you haven't explored.
If all else fails, take out a subscription to "PC Pilot" magazine, and fly with loads of others via the internet (doesn't appeal to me personally, but it's got to be better than cross-country hockey).
Change need not mean giving up.
G