It is really a long time - but that is how acne
You have to see a good dermatologist
- apart from general measures and hygiene, they can advice some potent medicines, like tretinoin
. Because of known side effects, it should only be taken under medical supervision and needs follow up.
It has nothing to do with your height and weight
Cosmetic aspects are more of concern than 'medical' aspects. There is nothing of great concern. After all, what can not be cured, has to be endured - and your condition seems curable...