Am I the only one who misses being younger?

I'm going to be in my 30's soon. I really miss the endless energy I had in my early 20's. I still have energy, lift, am active, etc. but in your 20's you have an amazing sex drive and energy. I can already feel it dropping. I just don't have the same life drive I had during those years and really miss it.

Back then I would want to fuck several times a day. Now there are some days where I literally don't feel like fucking. I could also work out every single day, now if I do an intense workout I might need some rest the following day because my energy gets depleted. Some days I also just feel exhausted/light headed for no reason.