is it that important to be curvy?

im not a curvy girl, i have a pretty basic body shape but my problem is that my height is 1,67cm (about 5’6) and my weight is 45kgs (100 pounds)

do boys see being light and not curvy as a turn off?

because im pretty and i cant find a boy to like me yet, i figured the problem is that i might be too light (i have a very fast metabolism so even if i eat more than i need i cant seem to gain any weight)