I am 22.
Emotionally, I feel like I am about 12, and at times even younger.
At the doctor's office the other day, a nurse told me that she thought I was 14, so physically I look much younger than I am.
However, in terms of actual physical health and mental stress level, I feel like I have been alive for decades longer than I really have.
I think it is interesting how many of us feel more mature than our peers when we are in our teens, but then in our 20s and 30s we feel younger or less mature. This is how it was for me-when I was in middle school, many of my classmates seemed very immature, and I preferred to converse with the teachers. However, now I feel like I am being left behind by my friends/acquaintances, because they are "growing up" but I am not.