Partial Knee Replacement

Hi there

I was just wondering if anyone had had a similar situation to mine and should appreciate your advice: 10 years ago was diagnosed with OA in knee, 8 years later the pain was excruciating, couldn't sleep, had pain when resting etc and it took a year and a half to get a referral to Physio which worked to a certain extent. Then after 6 months the physio referred me to a senior physio at MSK Dept and he then referred me to a surgeon where I was told to have a partial knee replacement as a gel injection probably wouldn't work. I have a smaller gap in meniscal joint, a couple of small bone spurs and a tear to meniscus. However, 8 months ago I joined a gym and got a personal trainer who gave me specific knee exercises. The upshot is that today my knee feels so much better, I can walk, garden, sleep without pain. Occasionally I get a twinge which is slightly painful but the pain doesn't persist. So my question is should I still have the surgery or postpone it? It's not that I don't want it, just that I am 60 and a partial only lasts so many years and am I being premature. Or should I be grateful that my leg muscles are strong and therefore recovery will be better. I know the OA won't go away but I just don't know what to do. I just can't seem to talk to anyone else. Thank you!