Cath, I think you are in the stage of confusion. Feeling old is just a state of mind.
You don't have to lose teeth, have white hairs and reach a certain age to be old.
I am proud to say that I am 30, I have white hairs but I feel and look so young that I wanted to be 50. There could be activities that I can no longer endure to do like biking for hours or go mountain hiking for days. These are activities that can't be endured by literally old people but for those who in spite of their old age conquered their physical limitations by doing almost the impossible. They are those who are young in spirit and don't see age as a hindrance. I have seen a number of young ones who appear to be at the verge of helplessness, that they prefer suicide, drugs, alcohol to name a few. This reality contradicts the very meaning of youth: hope, adventure, life to its fullest. Truly, there are really people who wanted to grow old faster because they don't want to go to through life pains and disappointments. But, age and life's spices go together. We grow older but wiser and tougher because of the learnings we get from our very mistakes or failed relationships. If we don't learn from these, I guess age doesn't count at all.
On the other hand, there are people who are between their 50's to 80's who dress up young and act young. For them, they can dress just like youngster because they can't accept that they are way past their age. Some old ones simply wanted to look better regardless of their lifestyle or clothing because that makes them feel better. Indeed, age is a state of mind, a matter of perspective.
I would like to share this tag to my friend Janyen, Phebie, Sherry, Angie, Sudha, Rose, Rosemarie, Chuchie and Rosa.