The age of old

At what age do you start to feel old? And at what age are you officially old?  I know for me the closer I get to a certain age bracket the more I view that bracket as still very much young. For example I'm still a couple of decades away but I view 60 as still very young!

My friend Li sent this group text to a bunch of us college homies:

She then attached 3 pics of herself all looking very fly. I was ready to fight her and told her so in my reply but then I had to really stop and think about it. We are all entering our 39th year (well they have. I still have 5 months to go!) and juggling careers and kids and relationships. That kind of load can weigh you down. Combined with the moments Li describes above and its easy to feel old. I know I do to a certain extent. I mean I still feel like an early 20 something but then I catch a glimpse of myself in the mirror and I'm reminded that I'm not. I don't look my age (thanks gene pool!) but I also can't pass for a baby faced 21 year old. Not that I want to mind you but you get where I'm going. . . I hope. I'm in that weird contradictory space of appreciating my grown woman status but not wanting to look like a woman of a certain age. Does that make sense? All I know is that ma'am would definitely set me off too!