Is it okay to be underweight if you still eat like a norma/healthy person?

[Rieka-heiwa Perkins]

I am REALLY UNDERWEIGHT! I have a 23in waist and am 5ft5.7 (Basically 5ft6). I weigh about 94-96 lbs. And I like the way I look, I feel okay, I have no symptoms of lack of nutrition. Am I still in danger?
I'm a girl