I'm 5'11 14 and only 105 lbs. Is that bad?

I'm 5'11 14 going to be 15 in September and I'm only 105 lbs. I'm active I can run extremely fast and I'm stronger than most of my friends. I just wanna know how much is should weigh because I'm skinny and I hate wearing shorts because of my little legs although I do have 8 pac abs and I'm pretty muscular.