52 Kilos for 162 is a pretty decent weight for your height bracket. consider yourself fit and healthy, Clark. ANyway keep up the steady diet.
One thing i realize is these days girls love to indulge in their fave food without counting the calories. that sure is fine if youre young with a hi-metabolic rate with a lots of physical activities.
but the down side to this behavior is that in later years, when their metabolic rate decreases, and with less physical activities behind the desk, they cannot stop their indulgences due to habit already (but its not impossible to change), they start packin it at the belly, thighs and creatin love handles and such.
you are great to realize how important it is to have a proper diet since young and making it a habit for yourself!!! keep it up