From the age of 6 to 22 (ish) I'd have said you could count on one hand the times I cried in front of anyone. Within that time I'm sure there were whole years I didn't cry at all.
By 22 I reached the goal I'd been aiming for, I achieved it, I didn't have a distant, near impossible target anymore. I don't know if that was why, but at the same time I started to cry, I cried if I failed, I cried if I felt hurt or rejected and alone I cried for an absolute grief of what a childhood should have been.
Fast forward 12 years and I cry (I guess) about once a week over all sorts of stuff, even if I watch a sad film. It isn't much of a big deal anymore, no-one's surprised that I cry anymore, more to the point I'm not surprised!
I know the ages are different but human beings are just human beings at the end of the day. I know for certain it's not impossible for things to change.