i feel old

I'm going to be forty-five soon. I've done a lot of thinking about age lately.
I developed a back problem over a year ago. Over that year I've done things like look at canes online, contemplate the use of the little cart at the grocery store, and choose clothes based on their ability to hide my orthopedic device.
Nice.
Then one day, the chiropractor told me that I needed more supportive shoes. What? Should I get those weird taupe colored orthopedic shoes? Maybe get some support stockings while I'm at it?

Here are some other things that make me feel old:

~ There are people who were born after I became an adult who are now adults themselves.

~ I have friends who are grandmas.

~ There are doctors younger than I am.

~Kids I used to babysit have kids.

~ I won't even go into the litany of physical decay.

~ I remember records, eight-tracks, and transistor radios.

~ I remember Elvis.

~ I remember when computers were mythical things that filled entire rooms in far off places.

~ I need my children's help to use my Itunes.

~ My phone is smarter than I am.

~ Young women call me sweetie and hon.

~Young men don't look at me. Old men do.

For a while, I considered giving in. I decided I would embrace my dotage, get those support hose, and spend my time reminiscing about the good old days. But you know what? I'm only forty-four. It's possible that I could live that many years more. I may be only half way done.

Fifty years ago forty-four was old. But in this century it's not. I'm not willing to spend half my life being old and decrepit.
There's not a lot more I can do about the decrepit part. I'm working on getting my back healed, but apart from that I can sure do something about my atitude.

My body may be a little out of control, but I can control my thoughts.
I'm gonna stop feeling old.

Any suggestions? What makes a person feel young? What makes a person seem young?