I am a New Member at Similar Worlds

Hi there, I'm happily married and in my early 40s. So far the 40s are the best years of my life.
I've never felt more empowered, organised, confident and uninhibited. Fortunately, my husband still finds me attractive but then I work hard to keep in shape mentally and physically as does he. We have a wonderful bond.
But I have a dread of getting older. I don't like the thought of being 50 or 60. I hope that changes by the time I get there.
Has anyone else struggled with the thought of getting older? Please tell.