Skinny and underweight with belly fat..wtf?

I'm 15 and I have a fast metabolism, and even though I eat a lot I'm still underweight, but I have belly fat ?? The little weight that I do gain goes to my stomach, and I want to get rid of it without loosing weight in other places. Are there exercises or something I can do? I don't exercises whatsoever, never in my life besides in wellness at school. It's not that I eat unhealthy though, and people seem to think I'm on a diet (which I'm not) because things with a lot of sugar (honey buns, cake, donuts, etc) disgust me (idk why, it just always has. It looks fattening and unhealthy and.. digesting..).