Castaway!
I hear you on the physical. I was doing great early 40's and wondering what everyone was complaining about, then my fibro got really bad. Oh, my goodness, did I feel old for the first time in my life!!!!!
But with age does come some wisdom! I figured out that if I didn't allow the pain to dampen my life, I was gonna rock! I took up scuba diving because I didn't think I could do it. I wanted to do it, but thought my lack of ability to lift heavy weight that I'd fail. Guess what! People are so nice and helpful that I can get in and out of the water with very little pain.
I've said it before, but one of the most freeing things in my life was when I gave up really caring what strangers think. I'm still a people pleaser kind of person, but put that energy into family and friends now.