I'm not really this old!

I'm 55 years old. How did that happen? I don't feel like I'm over half a century. It still shocks me when people look at me and say, "You don't look that old." I don't think of 55 as old anymore, especially since I said I would live to be 100. I still have a long ways to go!
I was at a store last week and for some reason age came up while I was talking to a clerk. He guessed my age as early 40's and I found myself saying. "Thank you". Who does that?
I wouldn't want to go back to an earlier age, but I don't like the way others see my age and when people ask me, "Are you STILL working?"
At a movie theatre in Florida, the ticket guy tried to sell me senior citizen tickets and the popcorn guy tried to give me a senior citizen discount (you had to be 65 for the discounts!). I was so angry and hurt and wouldn't accept either, though I tried to be gracious. I wanted to cry. My daughter was laughing and said they were just trying to give me a break, that I should have taken it.
Some people think anyone over 50 is finished. Well, I've go news for them....I've only just begun to live.

No one told me about this!

Fifty's the new 40, you're not getting older, you're getting better, along with age comes wisdom!
Who said that?? When I was younger, I swore that I'd grow old gracefully. I would stay fit and strong. Aging wouldn't slow ME down. I wasn't going to freak out over gray hair and run to color it. I'd let it turn gray naturally. Boy was I in for a surprise!
Don't get me wrong. I wouldn't want to go back to my 30's or 40's. I like my age. I feel wiser, more self-assured, more confident,.....usually. I just don't like how my body is giving up on me....weight gain where I didn't expect it, while I'm starving, stray hairs nobody told me about, gray hair that grew in like Morticis's gray streak! What's going on here?