Am i too thin, too fat, or just healthy? o.o?

Ok soo....I'm in 8th grade, I'm about 5'6 or 5'7.....one of those >.<'' and I'm also about 90 pounds.. oh and my age is 12 ^.^ I'm becoming 13 on October 30th!! :D Ok sorta side-tracked there but is this healthy? just wondering