Lot of what you are thinking and worrying about. Who are these unknown people saying things to (since everyone knows just to look at you :-)

Get into an argument with "you" and tell her to take a hike, you don't need her problems you have enough of your own

I got married when I was 39! I loved 30 though, I was finally an "adult" and no one could deny that. You don't want to be young so you worry about what everyone else is doing/saying do you? When you are older you become more sure of yourself because you have more experience, have seen more and understand some things better, etc. I still remember when I was like 8-9 and couldn't wait to be 12 and remember when you wanted to be 18 and then 21? Thirty is even better.