Assume that you only have the resources and money that you’ve acquired up to this point in your life, and you still have to pay rent, bills etc. You are basically physically capable of everyday activities but extreme feats (eg running marathons, climbing everest) are not realistic.
I also am a bachelor by choice. Long term relationships (even great ones) are a chore that you lose parts of yourself to, for better or worse. I’ve discovered I’m much more healthy, balanced, and happy without that dynamic.