u r very tall for ur age im 13 and 5'4 and one of the shortest girls in my skool lol (i weigh the same amount as u 150-155, t depends what part of the month it is!!) but listen my cousin is 12 and 5'8/5'9 and weighs 175 but if u were to look @ her u wouldnt be able to tell!! and i bet when ppl look @ u they cant tell either!! if u wanna trim down and loose a lil weight thatd be good but and ideal weight for someone ur height is about 135- 145 around there!! i just wanna say goodluck and hope everything works out for the best!!