An alternative perspective:
I was SO into track driving. I'd drive laps on my favorite tracks (Sebring International Raceway at the forefront) in my head falling asleep at night. I'd daydream about being on track. I SO looked forward to my next event.
After 20+ years of driving on tracks, including over 100 days instructing in HPDE (High Performance Driver Education), my mortality staring me in the face, I no longer looked forward to it. It started slowly: I'd skip the last session of the day, happy to put the race car on the trailer and drive it (and myself) home in one piece. Then I'd see a registration for the next event open up, and I'd think "I don't think I'll go." And so on.
Eventually, I'd register for an event, and not really want to go. I'd be at the track, not wanting to go out. I'd be just fine after I secured the race harness on, and put on my helmet and HANS device, and in line to go out. And I'd have a blast while on track. But the longing had left me.
After a half-dozen of these "I can take it or leave it" events, I finally decided I Was Done. And I made the difficult decision no longer to participate. I was no longer looking forward to it; in fact, I started to dread it.
OK, I'll admit, playing pool is not of the same caliber of "If I screw up I could die" consequence, however, I can definitely relate your experience regarding pool to my experience with driving a race car on track. When it no longer was fun, and something I looked forward to, I realized it was time. Time to move on.
I was very much at peace with the decision. I attended an event where my son, also an accomplished driver and wrencher participated, and it did not feel the same. I felt like an outsider. That cemented that I had made the right decision. I no longer felt as though I belonged, and it no longer extracted any joy from it.
Here's the question to ask yourself: "Can I derive ANY joy from this activity?" If the answer is an unequivocal "NO", then you have your justification to accept your decision and be at peace with it. If there is any hesitation in responding "NO", you should give it another chance. Take a break, revisit it in one, two, maybe three months, before you make your final decision.
Regardless of what you decide, we (I) respect your decision. Only YOU know what is best for you. And once you decide, be at peace with the decision.
I sincerely wish you best of luck in reconciling your feelings on this topic.
All the best, Doug