I am 34 years old would you consider that old?

No, that's not old. It's less than half the average lifespan.

Not anymore .........

yes...............

No, all of my kids are older than that.

Most mammals are dead by that age

Not at all, because ages that begins with a 2 or 3 are the prime years of your life.

Certainly not. You're not old if your life probably isn't even half over.

I read that your mental age and true age is half of your real age plus 5 years. Half of 34 is 17 and add 5 years is 22. You're not old at all - whether you say you're 22 or 34.

Not in the least and not even middle aged.

Yes, you are an old age pensioner.